Add fsh

3 years ago · c471a12974
--- a/.zsh/fsh/.editorconfig
+++ b/.zsh/fsh/.editorconfig
@ -0,0 +1,15 @@
 # Top-most editorconfig file

 root = true

 [*]
 end_of_line = lf
 tab_width   = 2
 indent_size = 2
 indent_style = space

 [Makefile]
 tab_width   = 8
 indent_size = 8
 indent_style = tab

--- a/.zsh/fsh/.gitattributes
+++ b/.zsh/fsh/.gitattributes
@ -0,0 +1 @@
 .revision-hash export-subst
--- a/.zsh/fsh/.github/workflows/test.yml
+++ b/.zsh/fsh/.github/workflows/test.yml
@ -0,0 +1,74 @@
 ---
 name: Tests
 on:
  push:
    paths-ignore:
      - '**.md'
      - '**.png'
  pull_request:
    paths-ignore:
      - '**.md'
      - '**.png'
  schedule:
    - cron: '29 7 * * 1'

 jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        version:
          - master
          - 5.8
          - 5.7.1
          - 5.7
          - 5.6.2
          - 5.6.1
          - 5.6
          - 5.5.1
          - 5.5
          - 5.4.2
          - 5.4.1
          - 5.4
          - 5.3.1
          - 5.3
          - 5.2
          - 5.1.1
          - 5.1
          - 5.0.8
          - 5.0.7
          - 5.0.6
          - 5.0.5
          - 5.0.4
          - 5.0.3
          - 5.0.2
          - 5.0.1
          - 5.0.0
          - 4.3.17
          - 4.3.16
          - 4.3.15
          - 4.3.14
          - 4.3.13
          - 4.3.12
          - 4.3.11
    container:
      image: zshusers/zsh:${{ matrix.version }}
    steps:
      - uses: actions/checkout@v2
      - run: install_packages bsdmainutils make procps
      - run: make test

  notify:
    runs-on: ubuntu-latest
    needs: test
    if: failure() && (github.repository_owner == 'zsh-users')
    steps:
      -
        name: Notify IRC
        uses: Gottox/irc-message-action@v1
        with:
          server: irc.libera.chat
          channel: '#zsh-syntax-highlighting'
          nickname: zsyh-gh-bot
          message: '${{ github.ref }} failed tests: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}'
--- a/.zsh/fsh/.gitignore
+++ b/.zsh/fsh/.gitignore
@ -0,0 +1,3 @@
 *.zwc*
 .pc/
 docs/all.md
--- a/.zsh/fsh/.revision-hash
+++ b/.zsh/fsh/.revision-hash
@ -0,0 +1 @@
 $Format:%H$
--- a/.zsh/fsh/.version
+++ b/.zsh/fsh/.version
@ -0,0 +1 @@
 0.8.0-alpha2-dev
--- a/.zsh/fsh/COPYING.md
+++ b/.zsh/fsh/COPYING.md
@ -0,0 +1,23 @@
 Copyright (c) 2010-2020 zsh-syntax-highlighting contributors
 All rights reserved.

 Redistribution and use in source and binary forms, with or without modification, are permitted
 provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice, this list of conditions
   and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list of
   conditions and the following disclaimer in the documentation and/or other materials provided
   with the distribution.
 * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
   may be used to endorse or promote products derived from this software without specific prior
   written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/.zsh/fsh/HACKING.md
+++ b/.zsh/fsh/HACKING.md
@ -0,0 +1,99 @@
 Hacking on zsh-syntax-highlighting itself
 =========================================

 This document includes information for people working on z-sy-h itself: on the
 core driver (`zsh-syntax-highlighting.zsh`), on the highlighters in the
 distribution, and on the test suite.  It does not target third-party
 highlighter authors (although they may find it an interesting read).

 The `main` highlighter
 ----------------------

 The following function `pz` is useful when working on the `main` highlighting:

 ```zsh
 pq() {
  (( $#argv )) || return 0
  print -r -l -- ${(qqqq)argv}
 }
 pz() {
  local arg
  for arg; do
    pq ${(z)arg}
  done
 }
 ```

 It prints, for each argument, its token breakdown, similar to how the main
 loop of the `main` highlighter sees it.

 Testing the `brackets` highlighter
 ----------------------------------

 Since the test harness empties `ZSH_HIGHLIGHT_STYLES` and the `brackets`
 highlighter interrogates `ZSH_HIGHLIGHT_STYLES` to determine how to highlight,
 tests must set the `bracket-level-#` keys themselves.  For example:

 ```zsh
 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=

 BUFFER='echo ({x})'

 expected_region_highlight=(
  "6  6  bracket-level-1" # (
  "7  7  bracket-level-2" # {
  "9  9  bracket-level-2" # }
  "10 10 bracket-level-1" # )
 )
 ```

 Testing the `pattern` and `regexp` highlighters
 -----------------------------------------------

 Because the `pattern` and `regexp` highlighters modifies `region_highlight`
 directly instead of using `_zsh_highlight_add_highlight`, the test harness
 cannot get the `ZSH_HIGHLIGHT_STYLES` keys.  Therefore, when writing tests, use
 the style itself as third word (cf. the
 [documentation for `expected_region_highlight`](docs/highlighters.md)).  For example:

 ```zsh
 ZSH_HIGHLIGHT_PATTERNS+=('rm -rf *' 'fg=white,bold,bg=red')

 BUFFER='rm -rf /'

 expected_region_highlight=(
  "1 8 fg=white,bold,bg=red" # rm -rf /
 )
 ```

 Memos and commas
 ----------------

 We append to `region_highlight` as follows:


 ```zsh
 region_highlight+=("$start $end $spec, memo=zsh-syntax-highlighting")
 ```

 That comma is required to cause zsh 5.8 and older to ignore the memo without
 ignoring the `$spec`.  It's a hack, but given that no further 5.8.x patch
 releases are planned, it's been deemed acceptable.  See issue #418 and the
 cross-referenced issues.


 Miscellany
 ----------

 If you work on the driver (`zsh-syntax-highlighting.zsh`), you may find the following zstyle useful:

 ```zsh
 zstyle ':completion:*:*:*:*:globbed-files' ignored-patterns {'*/',}zsh-syntax-highlighting.plugin.zsh
 ```

 IRC channel
 -----------

 We're on #zsh-syntax-highlighting on Libera.Chat.

--- a/.zsh/fsh/INSTALL.md
+++ b/.zsh/fsh/INSTALL.md
@ -0,0 +1,131 @@
 How to install
 --------------

 ### Using packages

 * Arch Linux: [community/zsh-syntax-highlighting][arch-package] / [AUR/zsh-syntax-highlighting-git][AUR-package]
 * Debian: `zsh-syntax-highlighting` package [in `stretch`][debian-package] (or in [OBS repository][obs-repository])
 * Fedora: [zsh-syntax-highlighting package][fedora-package-alt] in Fedora 24+ (or in [OBS repository][obs-repository])
 * FreeBSD: `pkg install zsh-syntax-highlighting` (port name: [`shells/zsh-syntax-highlighting`][freebsd-port])
 * Gentoo: [app-shells/zsh-syntax-highlighting][gentoo-repository]
 * Mac OS X / Homebrew: [brew install zsh-syntax-highlighting][brew-package]
 * NetBSD: `pkg_add zsh-syntax-highlighting` (port name: [`shells/zsh-syntax-highlighting`][netbsd-port])
 * OpenBSD: `pkg_add zsh-syntax-highlighting` (port name: [`shells/zsh-syntax-highlighting`][openbsd-port])
 * openSUSE / SLE: `zsh-syntax-highlighting` package in [OBS repository][obs-repository]
 * RHEL / CentOS / Scientific Linux: `zsh-syntax-highlighting` package in [OBS repository][obs-repository]
 * Ubuntu: `zsh-syntax-highlighting` package [in Xenial][ubuntu-package] (or in [OBS repository][obs-repository])
 * Void Linux: `zsh-syntax-highlighting package` [in XBPS][void-package]

 [arch-package]: https://www.archlinux.org/packages/zsh-syntax-highlighting
 [AUR-package]: https://aur.archlinux.org/packages/zsh-syntax-highlighting-git
 [brew-package]: https://github.com/Homebrew/homebrew-core/blob/master/Formula/zsh-syntax-highlighting.rb
 [debian-package]: https://packages.debian.org/zsh-syntax-highlighting
 [fedora-package]: https://apps.fedoraproject.org/packages/zsh-syntax-highlighting
 [fedora-package-alt]: https://bodhi.fedoraproject.org/updates/?packages=zsh-syntax-highlighting
 [freebsd-port]: http://www.freshports.org/textproc/zsh-syntax-highlighting/
 [gentoo-repository]: https://packages.gentoo.org/packages/app-shells/zsh-syntax-highlighting
 [netbsd-port]: http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/shells/zsh-syntax-highlighting/
 [obs-repository]: https://software.opensuse.org/download.html?project=shells%3Azsh-users%3Azsh-syntax-highlighting&package=zsh-syntax-highlighting
 [openbsd-port]: https://cvsweb.openbsd.org/ports/shells/zsh-syntax-highlighting/
 [ubuntu-package]: https://launchpad.net/ubuntu/+source/zsh-syntax-highlighting
 [void-package]: https://github.com/void-linux/void-packages/tree/master/srcpkgs/zsh-syntax-highlighting

 See also [repology's cross-distro index](https://repology.org/metapackage/zsh-syntax-highlighting/versions)


 ### In your ~/.zshrc

 Simply clone this repository and source the script:

 ```zsh
 git clone https://github.com/zsh-users/zsh-syntax-highlighting.git
 echo "source ${(q-)PWD}/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh" >> ${ZDOTDIR:-$HOME}/.zshrc
 ```

  Then, enable syntax highlighting in the current interactive shell:

 ```zsh
 source ./zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
 ```

  If `git` is not installed, download and extract a snapshot of the latest
  development tree from:

 ```
 https://github.com/zsh-users/zsh-syntax-highlighting/archive/master.tar.gz
 ```

  Note the `source` command must be **at the end** of `~/.zshrc`.


 ### With a plugin manager

 Note that `zsh-syntax-highlighting` must be the last plugin sourced.

 The zsh-syntax-highlighting authors recommend manual installation over the use
 of a framework or plugin manager.

 This list is incomplete as there are too many
 [frameworks / plugin managers][framework-list] to list them all here.

 [framework-list]: https://github.com/unixorn/awesome-zsh-plugins#frameworks

 #### [Antigen](https://github.com/zsh-users/antigen)

 Add `antigen bundle zsh-users/zsh-syntax-highlighting` as the last bundle in
 your `.zshrc`.

 #### [Oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh)

 1. Clone this repository in oh-my-zsh's plugins directory:

    ```zsh
    git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting
    ```

 2. Activate the plugin in `~/.zshrc`:

    ```zsh
    plugins=( [plugins...] zsh-syntax-highlighting)
    ```

 3. Restart zsh (such as by opening a new instance of your terminal emulator).

 #### [Prezto](https://github.com/sorin-ionescu/prezto)

 Zsh-syntax-highlighting is included with Prezto. See the
 [Prezto documentation][prezto-docs] to enable and configure highlighters.

 [prezto-docs]: https://github.com/sorin-ionescu/prezto/tree/master/modules/syntax-highlighting

 #### [zgen](https://github.com/tarjoilija/zgen)

 Add `zgen load zsh-users/zsh-syntax-highlighting` to the end of your `.zshrc`.

 #### [zplug](https://github.com/zplug/zplug)

 Add `zplug "zsh-users/zsh-syntax-highlighting", defer:2` to your `.zshrc`.

 #### [zplugin](https://github.com/psprint/zplugin)

 Add `zplugin load zsh-users/zsh-syntax-highlighting` to the end of your
 `.zshrc`.


 ### System-wide installation

 Any of the above methods is suitable for a single-user installation,
 which requires no special privileges.  If, however, you desire to install
 zsh-syntax-highlighting system-wide, you may do so by running

 ```zsh
 make install
 ```

 and directing your users to add

 ```zsh
 source /usr/local/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
 ```

 to their `.zshrc`s.
--- a/.zsh/fsh/Makefile
+++ b/.zsh/fsh/Makefile
@ -0,0 +1,64 @@
 NAME=zsh-syntax-highlighting

 INSTALL?=install -c
 PREFIX?=/usr/local
 SHARE_DIR?=$(DESTDIR)$(PREFIX)/share/$(NAME)
 DOC_DIR?=$(DESTDIR)$(PREFIX)/share/doc/$(NAME)
 ZSH?=zsh # zsh binary to run tests with

 all:
 	cd docs && \
 	cp highlighters.md all.md && \
 	printf '\n\nIndividual highlighters documentation\n=====================================' >> all.md && \
 	for doc in highlighters/*.md; do printf '\n\n'; cat "$$doc"; done >> all.md

 install: all
 	$(INSTALL) -d $(SHARE_DIR)
 	$(INSTALL) -d $(DOC_DIR)
 	cp .version zsh-syntax-highlighting.zsh $(SHARE_DIR)
 	cp COPYING.md README.md changelog.md $(DOC_DIR)
 	sed -e '1s/ .*//' -e '/^\[build-status-[a-z]*\]: /d' < README.md > $(DOC_DIR)/README.md
 	if [ x"true" = x"`git rev-parse --is-inside-work-tree 2>/dev/null`" ]; then \
 		git rev-parse HEAD; \
 	else \
 		cat .revision-hash; \
 	fi > $(SHARE_DIR)/.revision-hash
 	:
 # The [ -e ] check below is to because sh evaluates this with (the moral
 # equivalent of) NONOMATCH in effect, and highlighters/*.zsh has no matches.
 	for dirname in highlighters highlighters/*/ ; do \
 		$(INSTALL) -d $(SHARE_DIR)/"$$dirname"; \
 		for fname in "$$dirname"/*.zsh ; do [ -e "$$fname" ] && cp "$$fname" $(SHARE_DIR)"/$$dirname"; done; \
 	done
 	cp -R docs/* $(DOC_DIR)

 clean:
 	rm -f docs/all.md

 test:
 	@$(ZSH) -fc 'echo ZSH_PATCHLEVEL=$$ZSH_PATCHLEVEL'
 	@result=0; \
 	for test in highlighters/*; do \
 		if [ -d $$test/test-data ]; then \
 			echo "Running test $${test##*/}"; \
 			env -i QUIET=$$QUIET $${TERM:+"TERM=$$TERM"} $(ZSH) -f tests/test-highlighting.zsh "$${test##*/}"; \
 			: $$(( result |= $$? )); \
 		fi \
 	done; \
 	exit $$result

 quiet-test:
 	$(MAKE) test QUIET=y

 perf:
 	@result=0; \
 	for test in highlighters/*; do \
 		if [ -d $$test/test-data ]; then \
 			echo "Running test $${test##*/}"; \
 			$(ZSH) -f tests/test-perfs.zsh "$${test##*/}"; \
 			: $$(( result |= $$? )); \
 		fi \
 	done; \
 	exit $$result

 .PHONY: all install clean test perf
--- a/.zsh/fsh/README.md
+++ b/.zsh/fsh/README.md
@ -0,0 +1,97 @@
 zsh-syntax-highlighting [![Build Status][build-status-image]][build-status]
 =======================

 **[Fish shell][fish]-like syntax highlighting for [Zsh][zsh].**

 *Requirements: zsh 4.3.11+.*

 [fish]: https://fishshell.com/
 [zsh]: https://www.zsh.org/

 This package provides syntax highlighting for the shell zsh.  It enables
 highlighting of commands whilst they are typed at a zsh prompt into an
 interactive terminal.  This helps in reviewing commands before running
 them, particularly in catching syntax errors.

 Some examples:

 Before: [![Screenshot #1.1](images/before1-smaller.png)](images/before1.png)
 <br/>
 After:&nbsp; [![Screenshot #1.2](images/after1-smaller.png)](images/after1.png)

 Before: [![Screenshot #2.1](images/before2-smaller.png)](images/before2.png)
 <br/>
 After:&nbsp; [![Screenshot #2.2](images/after2-smaller.png)](images/after2.png)

 Before: [![Screenshot #3.1](images/before3-smaller.png)](images/before3.png)
 <br/>
 After:&nbsp; [![Screenshot #3.2](images/after3-smaller.png)](images/after3.png)

 Before: [![Screenshot #4.1](images/before4-smaller.png)](images/before4-smaller.png)
 <br/>
 After:&nbsp; [![Screenshot #4.2](images/after4-smaller.png)](images/after4-smaller.png)



 How to install
 --------------

 See [INSTALL.md](INSTALL.md).


 FAQ
 ---

 ### Why must `zsh-syntax-highlighting.zsh` be sourced at the end of the `.zshrc` file?

 zsh-syntax-highlighting works by hooking into the Zsh Line Editor (ZLE) and
 computing syntax highlighting for the command-line buffer as it stands at the
 time z-sy-h's hook is invoked.

 In zsh 5.2 and older,
 `zsh-syntax-highlighting.zsh` hooks into ZLE by wrapping ZLE widgets.  It must
 be sourced after all custom widgets have been created (i.e., after all `zle -N`
 calls and after running `compinit`) in order to be able to wrap all of them.
 Widgets created after z-sy-h is sourced will work, but will not update the
 syntax highlighting.

 In zsh newer than 5.8 (not including 5.8 itself),
 zsh-syntax-highlighting uses the `add-zle-hook-widget` facility to install
 a `zle-line-pre-redraw` hook.  Hooks are run in order of registration,
 therefore, z-sy-h must be sourced (and register its hook) after anything else
 that adds hooks that modify the command-line buffer.

 ### Does syntax highlighting work during incremental history search?

 Highlighting the command line during an incremental history search (by default bound to
 to <kbd>Ctrl+R</kbd> in zsh's emacs keymap) requires zsh 5.4 or newer.

 Under zsh versions older than 5.4, the zsh-default [underlining][zshzle-Character-Highlighting]
 of the matched portion of the buffer remains available, but zsh-syntax-highlighting's
 additional highlighting is unavailable.  (Those versions of zsh do not provide
 enough information to allow computing the highlighting correctly.)

 See issues [#288][i288] and [#415][i415] for details.

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
 [i288]: https://github.com/zsh-users/zsh-syntax-highlighting/pull/288
 [i415]: https://github.com/zsh-users/zsh-syntax-highlighting/pull/415

 ### How are new releases announced?

 There is currently no "push" announcements channel.  However, the following
 alternatives exist:

 - GitHub's RSS feed of releases: https://github.com/zsh-users/zsh-syntax-highlighting/releases.atom
 - An anitya entry: https://release-monitoring.org/project/7552/


 How to tweak
 ------------

 Syntax highlighting is done by pluggable highlighter scripts.  See the
 [documentation on highlighters](docs/highlighters.md) for details and
 configuration settings.

 [build-status]: https://github.com/zsh-users/zsh-syntax-highlighting/actions
 [build-status-image]: https://github.com/zsh-users/zsh-syntax-highlighting/workflows/Tests/badge.svg
--- a/.zsh/fsh/changelog.md
+++ b/.zsh/fsh/changelog.md
@ -0,0 +1,884 @@
 # Changes in HEAD


 ## Changes fixed as part of the switch to zle-line-pre-redraw

 The changes in this section were fixed by switching to a `zle-line-pre-redraw`-based
 implementation.

 Note: The new implementation will only be used on future zsh releases,
 numbered 5.8.0.3 and newer, due to interoperability issues with other plugins
 (issues #418 and #579).  The underlying zsh feature has been available since
 zsh 5.2.

 Whilst under development, the new implementation was known as the
 "feature/redrawhook" topic branch.

 - Fixed: Highlighting not triggered after popping a buffer from the buffer stack
  (using the `push-line` widget, default binding: `M-q`)
  [#40]

 - Fixed: Invoking completion when there were no matches removed highlighting
  [#90, #470]

 - Fixed: Two successive deletes followed by a yank only yanked the latest
  delete, rather than both of them
  [#150, #151, #160; cf. #183]

 - Presumed fixed: Completing `$(xsel)` results in an error message from `xsel`,
  with pre-2017 versions of `xsel`.  (For 2017 vintage and newer, see the issue
  for details.)
  [#154]

 - Fixed: When the standard `bracketed-paste-magic` widget is in use, pastes were slow
  [#295]

 - Fixed: No way to prevent a widget from being wrapped
  [#324]

 - Fixed: No highlighting while cycling menu completion
  [#375]

 - Fixed: Does not coexist with the `IGNORE_EOF` option
  [#377]

 - Fixed: The `undefined-key` widget was wrapped
  [#421]

 - Fixed: Does not coexist with the standard `surround` family of widgets
  [#520]

 - Fixed: First completed filename doesn't get `path` highlighting
  [#632]


 ## Other changes

 - Add issue #712 to the previous release's changelog (hereinafter).


 # Changes in 0.8.0-alpha1-pre-redrawhook

 ## Notice about an improbable-but-not-impossible forward incompatibility

 Everyone can probably skip this section.

 The `master` branch of zsh-syntax-highlighting uses a zsh feature that has not
 yet appeared in a zsh release: the `memo=` feature, added to zsh in commit
 zsh-5.8-172-gdd6e702ee (after zsh 5.8, before zsh 5.9).  In the unlikely event
 that this zsh feature should change in an incompatible way before the next
 stable zsh release, set `zsh_highlight__memo_feature=0` in your .zshrc files to
 disable use of the new feature.

 z-sy-h dogfoods the new, unreleased zsh feature because that feature was
 added to zsh at z-sy-h's initiative.  The new feature is used in the fix
 to issue #418.


 ## Incompatible changes:

 - An unsuccessful completion (a <kbd>⮀ Tab</kbd> press that doesn't change the
  command line) no longer causes highlighting to be lost.  Visual feedback can
  alternatively be achieved by setting the `format` zstyle under the `warnings`
  tag, for example,

        zstyle ':completion:*:warnings' format '%F{red}No matches%f'

    Refer to the [description of the `format` style in `zshcompsys(1)`]
    [zshcompsys-Standard-Styles-format].

    (#90, part of #245 (feature/redrawhook))

 [zshcompsys-Standard-Styles]: http://zsh.sourceforge.net/Doc/Release/Completion-System.html#Standard-Styles
 [zshcompsys-Standard-Styles-format]: http://zsh.sourceforge.net/Doc/Release/Completion-System.html#index-format_002c-completion-style
  


 ## Other changes:

 - Document `$ZSH_HIGHLIGHT_MAXLENGTH`.
  [#698]

 - Optimize highlighting unquoted words (words that are not in single quotes, double quotes, backticks, or dollar-single-quotes)
  [#730]

 - Redirection operators (e.g., `<` and `>`) are now highlighted by default
  [#646]

 - Propertly terminate `noglob` scope in try/always blocks
  [#577]

 - Don't error out when `KSH_ARRAYS` is set in the calling scope
  [#622, #689]

 - Literal semicolons in array assignments (`foo=( bar ; baz )`) are now
  highlighted as errors.
  [3ca93f864fb6]

 - Command separators in array assignments (`foo=( bar | baz )`) are now
  highlighted as errors.
  [#651, 81267ca3130c]

 - Support parameter elision in command position (e.g., `$foo ls` where `$foo` is unset or empty)
  [#667]

 - Don't consider the filename in `sudo -e /path/to/file` to be a command position
  [#678]

 - Don't look up absolute directory names in $cdpath
  [2cc2583f8f12, part of #669]

 - Fix `exec 2>&1;` being highlighted as an error.
  [#676]

 - Fix `: $(<*)` being highlighted as globbing.
  [#582]

 - Fix `cat < *` being highlighting as globbing when the `MULTIOS` option is unset.
  [#583]

 - Fix `echo >&2` highlighting the `2` as a filename if a file by that name happened to exist
  [#694, part of #645]

 - Fix `echo >&-` highlighting the `-` as a filename if a file by that name happened to exist
  [part of #645]

 - Fix `echo >&p` highlighting the `p` as a filename if a file by that name happened to exist
  [part of #645]

 - Fix wrong highlighting of unquoted parameter expansions under zsh 5.2 and older
  [e165f18c758e]

 - Highlight global aliases
  [#700]

 - Highlight `: =nosuchcommand' as an error (when the `EQUALS` option hasn't been unset).
  [#430]

 - Highlight reserved word after assignments as errors (e.g., `foo=bar (ls;)`)
  [#461]

 - Correctly highlight `[[ foo && bar || baz ]]`.

 - Highlight non-executable files in command position correctly (e.g., `% /etc/passwd`)
  [#202, #669]

 - Highlight directories in command position correctly, including `AUTO_CD` support
  [#669]

 - Recognize `env` as a precommand (e.g., `env FOO=bar ls`)

 - Recognize `strace` as a precommand

 - Fix an error message on stderr before every prompt when the `WARN_NESTED_VAR` zsh option is set:
  `_zsh_highlight_main__precmd_hook:1: array parameter _zsh_highlight_main__command_type_cache set in enclosing scope in function _zsh_highlight_main__precmd_hook`
  [#727, #731, #732, #733]

 - Fix highlighting of alias whose definitions use a simple command terminator
  (such as `;`, `|`, `&&`) before a newline
  [#677; had regressed in 0.7.0]

 - Highlight arithmetic expansions (e.g., `$(( 42 ))`)
  [#607 #649 #704]

 - Highlight the parentheses of array assignments as reserved words (`foo=( bar )`).
  The `assign` style remains supported and has precedence.
  [#585]

 - Fix interoperability issue with other plugins that use highlighting.  The fix
  requires zsh 5.8.0.3 or newer.  (zsh 5.8.0.2-dev from the `master` branch,
  revision zsh-5.8-172-gdd6e702ee or newer is also fine.)
  [#418, https://github.com/okapia/zsh-viexchange/issues/1]

 - Improve performance of the `brackets` highlighter.

 - Fix highlighting of pre-command redirections (e.g., the `$fn` in `<$fn cat`)
  [#712]


 # Changes in version 0.7.1

 - Remove out-of-date information from the 0.7.0 changelog.


 # Changes in version 0.7.0

 This is a stable bugfix and feature release.  Major new features and changes include:

 - Add `ZSH_HIGHLIGHT_DIRS_BLACKLIST` to disable "path" and "path prefix"
  highlighting for specific directories
  [#379]

 - Add the "regexp" highlighter, modelled after the pattern highlighter
  [4e6f60063f1c]

 - When a word uses globbing, only the globbing metacharacters will be highlighted as globbing:
  in `: foo*bar`, only the `*` will be blue.
  [e48af357532c]

 - Highlight pasted quotes (e.g., `: foo"bar"`)
  [dc1b2f6fa4bb]

 - Highlight command substitutions (`` : `ls` ``, `: $(ls)`)
  [c0e64fe13178 and parents, e86f75a840e7, et al]

 - Highlight process substitutions (`: >(nl)`, `: <(pwd)`, `: =(git diff)`)
  [c0e64fe13178 and parents, e86f75a840e7, et al]

 - Highlight command substitutions inside double quotes (``: "`foo`"``)
  [f16e858f0c83]

 - Highlight many precommands (e.g., `nice`, `stdbuf`, `eatmydata`;
  see `$precommand_options` in the source)

 - Highlight numeric globs (e.g., `echo /lib<->`)

 - Assorted improvements to aliases highlighting
  (e.g.,
   `alias sudo_u='sudo -u'; sudo_u jrandom ls`,
   `alias x=y y=z z=nosuchcommand; x`,
   `alias ls='ls -l'; \ls`)
  [f3410c5862fc, 57386f30aec8, #544, and many others]

 - Highlight some more syntax errors
  [dea05e44e671, 298ef6a2fa30]

 - New styles: named file descriptors, `RC_QUOTES`, and unclosed quotes (e.g., `echo "foo<CURSOR>`)
  [38c794a978cd, 25ae1c01216c, 967335dfc5fd]

 - The 'brackets' highlighting no longer treats quotes specially.
  [ecdda36ef56f]


 Selected bugfixes include:

 - Highlight `sudo` correctly when it's not installed
  [26a82113b08b]

 - Handle some non-default options being set in zshrc
  [b07ada1255b7, a2a899b41b8, 972ad197c13d, b3f66fc8748f]

 - Fix off-by-one highlighting in vi "visual" mode (vicmd keymap)
  [be3882aeb054]

 - The 'yank-pop' widget is not wrapped
  [#183]


 Known issues include:

 - A multiline alias that uses a simple command terminator (such as `;`, `|`, `&&`)
  before a newline will incorrectly be highlighted as an error.  See issue #677
  for examples and workarounds.
  [#677]
  [UPDATE: Fixed in 0.8.0]


 # Changes in version 0.6.0

 This is a stable release, featuring bugfixes and minor improvements.


 ## Performance improvements:

 (none)


 ## Added highlighting of:

 - The `isearch` and `suffix` [`$zle_highlight` settings][zshzle-Character-Highlighting].
  (79e4d3d12405, 15db71abd0cc, b56ee542d619; requires zsh 5.3 for `$ISEARCHMATCH_ACTIVE` / `$SUFFIX_ACTIVE` support)

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting

 - Possible history expansions in double-quoted strings.
  (76ea9e1df316)

 - Mismatched `if`/`then`/`elif`/`else`/`fi`.
  (73cb83270262)


 ## Fixed highlighting of:

 - A comment line followed by a non-comment line.
  (#385, 9396ad5c5f9c)

 - An unquoted `$*` (expands to the positional parameters).
  (237f89ad629f)

 - history-incremental-pattern-search-backward under zsh 5.3.1.
  (#407, #415, 462779629a0c)


 ## API changes (for highlighter authors):

 (none)


 ## Developer-visible changes:

 - tests: Set the `ALIAS_FUNC_DEF` option for zsh 5.4 compatibility.
  (9523d6d49cb3)


 ## Other changes:

 - docs: Added before/after screenshots.
  (cd9ec14a65ec..b7e277106b49)

 - docs: Link Fedora package.
  (3d74aa47e4a7, 5feed23962df)

 - docs: Link FreeBSD port.
  (626c034c68d7)

 - docs: Link OpenSUSE Build Service packages
  (#419, dea1fedc7358)

 - Prevent user-defined aliases from taking effect in z-sy-h's own code.
  (#390, 2dce602727d7, 8d5afe47f774; and #392, #395, b8fa1b9dc954)

 - docs: Update zplug installation instructions.
  (#399, 4f49c4a35f17)

 - Improve "unhandled ZLE widget 'foo'" error message.
  (#409, be083d7f3710)

 - Fix printing of "failed loading highlighters" error message.
  (#426, ad522a091429)


 # Changes in version 0.5.0


 ## Performance improvements:

 We thank Sebastian Gniazdowski and "m0viefreak" for significant contributions
 in this area.

 - Optimize string operations in the `main` (default) highlighter.
  (#372/3cb58fd7d7b9, 02229ebd6328, ef4bfe5bcc14, #372/c6b6513ac0d6, #374/15461e7d21c3)

 - Command word highlighting:  Use the `zsh/parameter` module to avoid forks.
  Memoize (cache) the results.
  (#298, 3ce01076b521, 2f18ba64e397, 12b879caf7a6; #320, 3b67e656bff5)

 - Avoid forks in the driver and in the `root` highlighter.
  (b9112aec798a, 38c8fbea2dd2)


 ## Added highlighting of:

 - `pkexec` (a precommand).
  (#248, 4f3910cbbaa5)

 - Aliases that cannot be defined normally nor invoked normally (highlighted as an error).
  (#263 (in part), 28932316cca6)

 - Path separators (`/`) — the default behaviour remains to highlight path separators
  and path components the same way.
  (#136, #260, 6cd39e7c70d3, 9a934d291e7c, f3d3aaa00cc4)

 - Assignments to individual positional arguments (`42=foo` to assign to `$42`).
  (f4036a09cee3)

 - Linewise region (the `visual-line-mode` widget, bound to `V` in zsh's `vi` keymap).
  (#267, a7a7f8b42280, ee07588cfd9b)

 - Command-lines recalled by `isearch` mode; requires zsh≥5.3.
  (#261 (in part); #257; 4ad311ec0a68)

 - Command-lines whilst the `IGNORE_BRACES` or `IGNORE_CLOSE_BRACES` option is in effect.
  (a8a6384356af, 02807f1826a5)

 - Mismatched parentheses and braces (in the `main` highlighter).
  (51b9d79c3bb6, 2fabf7ca64b7, a4196eda5e6f, and others)

 - Mismatched `do`/`done` keywords.
  (b2733a64da93)

 - Mismatched `foreach`/`end` keywords.
  (#96, 2bb8f0703d8f)

 - In Bourne-style function definitions, when the `MULTI_FUNC_DEF` option is set
  (which is the default), highlight the first word in the function body as
  a command word: `f() { g "$@" }`.
  (6f91850a01e1)

 - `always` blocks.
  (#335, e5782e4ddfb6)

 - Command substitutions inside double quotes, `"$(echo foo)"`.
  (#139 (in part), c3913e0d8ead)

 - Non-alphabetic parameters inside double quotes (`"$$"`, `"$#"`, `"$*"`, `"$@"`, `"$?"`, `"$-"`).
  (4afe670f7a1b, 44ef6e38e5a7)

 - Command words from future versions of zsh (forward compatibly).
  This also adds an `arg0` style that all other command word styles fall back to.
  (b4537a972eed, bccc3dc26943)

 - Escaped history expansions inside double quotes: `: "\!"`
  (28d7056a7a06, et seq)


 ## Fixed highlighting of:

 - Command separator tokens in syntactically-invalid positions.
  (09c4114eb980)

 - Redirections with a file descriptor number at command word.
  (#238 (in part), 73ee7c1f6c4a)

 - The `select` prompt, `$PS3`.
  (#268, 451665cb2a8b)

 - Values of variables in `vared`.
  (e500ca246286)

 - `!` as an argument (neither a history expansion nor a reserved word).
  (4c23a2fd1b90)

 - "division by zero" error under the `brackets` highlighter when `$ZSH_HIGHLIGHT_STYLES` is empty.
  (f73f3d53d3a6)

 - Process substitutions, `<(pwd)` and `>(wc -l)`.
  (#302, 6889ff6bd2ad, bfabffbf975c, fc9c892a3f15)

 - The non-`SHORT_LOOPS` form of `repeat` loops: `repeat 42; do true; done`.
  (#290, 4832f18c50a5, ef68f50c048f, 6362c757b6f7)

 - Broken symlinks (are now highlighted as files).
  (#342, 95f7206a9373, 53083da8215e)

 - Lines accepted from `isearch` mode.
  (#284; #257, #259, #288; 5bae6219008b, a8fe22d42251)

 - Work around upstream bug that triggered when the command word was a relative
  path, that when interpreted relative to a $PATH directory denoted a command;
  the effect of that upstream bug was that the relative path was cached as
  a "valid external command name".
  (#354, #355, 51614ca2c994, fdaeec45146b, 7d38d07255e4;
  upstream fix slated to be released in 5.3 (workers/39104))

 - After accepting a line with the cursor on a bracket, the matching bracket
  of the bracket under the cursor no longer remains highlighted (with the
  `brackets` highlighter).
  (4c4baede519a)

 - The first word on a new line within an array assignment or initialization is no
  longer considered a command position.
  (8bf423d16d46)

 - Subshells that end at command position, `(A=42)`, `(true;)`.
  (#231, 7fb6f9979121; #344, 4fc35362ee5a)

 - Command word after array assignment, `a=(lorem ipsum) pwd`.
  (#330, 7fb6f9979121)


 ## API changes (for highlighter authors):

 - New interface `_zsh_highlight_add_highlight`.
  (341a3ae1f015, c346f6eb6fb6)

 - tests: Specify the style key, not its value, in test expectations.
  (a830613467af, fd061b5730bf, eaa4335c3441, among others)

 - Module author documentation improvements.
  (#306 (in part), 217669270418, 0ff354b44b6e, 80148f6c8402, 364f206a547f, and others)

 - The driver no longer defines a `_zsh_highlight_${highlighter}_highlighter_cache`
  variable, which is in the highlighters' namespace.
  (3e59ab41b6b8, 80148f6c8402, f91a7b885e7d)

 - Rename highlighter entry points.  The old names remain supported for
  backwards compatibility.
  (a3d5dfcbdae9, c793e0dceab1)

 - tests: Add the "NONE" expectation.
  (4da9889d1545, 13018f3dd735, d37c55c788cd)

 - tests: consider a test that writes to stderr to have failed.
  (#291, 1082067f9315)


 ## Developer-visible changes:

 - Add `make quiet-test`.
  (9b64ad750f35)

 - test harness: Better quote replaceables in error messages.
  (30d8f92df225)

 - test harness: Fix exit code for XPASS.
  (bb8d325c0cbd)

 - Create [HACKING.md](HACKING.md).
  (cef49752fd0e)

 - tests: Emit a description for PASS test points.
  (6aa57d60aa64, f0bae44b76dd)

 - tests: Create a script that generates a test file.
  (8013dc3b8db6, et seq; `tests/generate.zsh`)


 ## Other changes:

 - Under zsh≤5.2, widgets whose names start with a `_` are no longer excluded
  from highlighting.
  (ed33d2cb1388; reverts part of 186d80054a40 which was for #65)

 - Under zsh≤5.2, widgets implemented by a function named after the widget are
  no longer excluded from highlighting.
  (487b122c480d; reverts part of 776453cb5b69)

 - Under zsh≤5.2, shell-unsafe widget names can now be wrapped.
  (#278, 6a634fac9fb9, et seq)

 - Correct some test expectations.
  (78290e043bc5)

 - `zsh-syntax-highlighting.plugin.zsh`: Convert from symlink to plain file
  for msys2 compatibility.
  (#292, d4f8edc9f3ad)

 - Document installation under some plugin managers.
  (e635f766bef9, 9cab566f539b)

 - Don't leak the `PATH_DIRS` option.
  (7b82b88a7166)

 - Don't require the `FUNCTION_ARGZERO` option to be set.
  (#338, 750aebc553f2)

 - Under zsh≤5.2, support binding incomplete/nonexistent widgets.
  (9e569bb0fe04, part of #288)

 - Make the driver reentrant, fixing possibility of infinite recursion
  under zsh≤5.2 under interaction with theoretical third-party code.
  (#305, d711563fe1bf, 295d62ec888d, f3242cbd6aba)

 - Fix warnings when `WARN_CREATE_GLOBAL` is set prior to sourcing zsh-syntax-highlighting.
  (z-sy-h already sets `WARN_CREATE_GLOBAL` internally.)
  (da60234fb236)

 - Warn only once, rather than once per keypress, when a highlighter is unavailable.
  (0a9b347483ae)


 # Changes in version 0.4.1

 ## Fixes:

 - Arguments to widgets were not properly dash-escaped.  Only matters for widgets
  that take arguments (i.e., that are invoked as `zle ${widget} -- ${args}`).
  (282c7134e8ac, reverts c808d2187a73)


 # Changes in version 0.4.0


 ## Added highlighting of:

 - incomplete sudo commands
  (a3047a912100, 2f05620b19ae)

    ```zsh
    sudo;
    sudo -u;
    ```

 - command words following reserved words
  (#207, #222, b397b12ac139 et seq, 6fbd2aa9579b et seq, 8b4adbd991b0)

    ```zsh
    if ls; then ls; else ls; fi
    repeat 10 do ls; done
    ```

    (The `ls` are now highlighted as a command.)

 - comments (when `INTERACTIVE_COMMENTS` is set)
  (#163, #167, 693de99a9030)

    ```zsh
    echo Hello # comment
    ```

 - closing brackets of arithmetic expansion, subshells, and blocks
  (#226, a59f442d2d34, et seq)

    ```zsh
    (( foo ))
    ( foo )
    { foo }
    ```

 - command names enabled by the `PATH_DIRS` option
  (#228, 96ee5116b182)

    ```zsh
    # When ~/bin/foo/bar exists, is executable, ~/bin is in $PATH,
    # and 'setopt PATH_DIRS' is in effect
    foo/bar
    ```

 - parameter expansions with braces inside double quotes
  (#186, 6e3720f39d84)

    ```zsh
    echo "${foo}"
    ```

 - parameter expansions in command word
  (#101, 4fcfb15913a2)

    ```zsh
    x=/bin/ls
    $x -l
    ```

 - the command separators '\|&', '&!', '&\|'

    ```zsh
    view file.pdf &!  ls
    ```


 ## Fixed highlighting of:

 - precommand modifiers at non-command-word position
  (#209, 2c9f8c8c95fa)

    ```zsh
    ls command foo
    ```

 - sudo commands with infix redirections
  (#221, be006aded590, 86e924970911)

    ```zsh
    sudo -u >/tmp/foo.out user ls
    ```

 - subshells; anonymous functions
  (#166, #194, 0d1bfbcbfa67, 9e178f9f3948)

    ```zsh
    (true)
    () { true }
    ```

 - parameter assignment statements with no command
  (#205, 01d7eeb3c713)

    ```zsh
    A=1;
    ```

    (The semicolon used to be highlighted as a mistake)

 - cursor highlighter: Remove the cursor highlighting when accepting a line.
  (#109, 4f0c293fdef0)


 ## Removed features:

 - Removed highlighting of approximate paths (`path_approx`).
  (#187, 98aee7f8b9a3)


 ## Other changes:

 - main highlighter refactored to use states rather than booleans.
  (2080a441ac49, et seq)

 - Fix initialization when sourcing `zsh-syntax-highlighting.zsh` via a symlink
  (083c47b00707)

 - docs: Add screenshot.
  (57624bb9f64b)

 - widgets wrapping: Don't add '--' when invoking widgets.
  (c808d2187a73) [_reverted in 0.4.1_]

 - Refresh highlighting upon `accept-*` widgets (`accept-line` et al).
  (59fbdda64c21)

 - Stop leaking match/mbegin/mend to global scope (thanks to upstream
  `WARN_CREATE_GLOBAL` improvements).
  (d3deffbf46a4)

 - 'make install': Permit setting `$(SHARE_DIR)` from the environment.
  (e1078a8b4cf1)

 - driver: Tolerate KSH_ARRAYS being set in the calling context.
  (#162, 8f19af6b319d)

 - 'make install': Install documentation fully and properly.
  (#219, b1619c001390, et seq)

 - docs: Improve 'main' highlighter's documentation.
  (00de155063f5, 7d4252f5f596)

 - docs: Moved to a new docs/ tree; assorted minor updates
  (c575f8f37567, 5b34c23cfad5, et seq)

 - docs: Split README.md into INSTALL.md
  (0b3183f6cb9a)

 - driver: Report `$ZSH_HIGHLIGHT_REVISION` when running from git
  (84734ba95026)


 ## Developer-visible changes:

 - Test harness converted to [TAP](http://testanything.org/tap-specification.html) format
  (d99aa58aaaef, et seq)

 - Run each test in a separate subprocess, isolating them from each other
  (d99aa58aaaef, et seq)

 - Fix test failure with nonexisting $HOME
  (#216, b2ac98b98150)

 - Test output is now colorized.
  (4d3da30f8b72, 6fe07c096109)

 - Document `make install`
  (a18a7427fd2c)

 - tests: Allow specifying the zsh binary to use.
  (557bb7e0c6a0)

 - tests: Add 'make perf' target
  (4513eaea71d7)

 - tests: Run each test in a sandbox directory
  (c01533920245)


 # Changes in version 0.3.0


 ## Added highlighting of:

 - suffix aliases (requires zsh 5.1.1 or newer):

    ```zsh
    alias -s png=display
    foo.png
    ```

 - prefix redirections:

    ```zsh
    <foo.txt cat
    ```

 - redirection operators:

    ```zsh
    echo > foo.txt
    ```

 - arithmetic evaluations:

    ```zsh
    (( 42 ))
    ```

 - $'' strings, including \x/\octal/\u/\U escapes

    ```zsh
    : $'foo\u0040bar'
    ```

 - multiline strings:

    ```zsh
    % echo "line 1
    line 2"
    ```

 - string literals that haven't been finished:

    ```zsh
    % echo "Hello, world
    ```
 - command words that involve tilde expansion:

    ```zsh
    % ~/bin/foo
    ```

 ## Fixed highlighting of:

 - quoted command words:

    ```zsh
    % \ls
    ```

 - backslash escapes in "" strings:

    ```zsh
    % echo "\x41"
    ```

 - noglob after command separator:

    ```zsh
    % :; noglob echo *
    ```

 - glob after command separator, when the first command starts with 'noglob':

    ```zsh
    % noglob true; echo *
    ```

 - the region (vi visual mode / set-mark-command) (issue #165)

 - redirection and command separators that would be highlighted as `path_approx`

    ```zsh
    % echo foo;‸
    % echo <‸
    ```

    (where `‸` represents the cursor location)

 - escaped globbing (outside quotes)

    ```zsh
    % echo \*
    ```


 ## Other changes:

 - implemented compatibility with zsh's paste highlighting (issue #175)

 - `$?` propagated correctly to wrapped widgets

 - don't leak $REPLY into global scope


 ## Developer-visible changes:

 - added makefile with `install` and `test` targets

 - set `warn_create_global` internally

 - document release process




 # Version 0.2.1

 (Start of changelog.)

--- a/.zsh/fsh/docs/highlighters.md
+++ b/.zsh/fsh/docs/highlighters.md
@ -0,0 +1,132 @@
 zsh-syntax-highlighting / highlighters
 ======================================

 Syntax highlighting is done by pluggable highlighters:

 * `main` - the base highlighter, and the only one [active by default][1].
 * `brackets` - [matches brackets][2] and parenthesis.
 * `pattern` - matches [user-defined patterns][3].
 * `cursor` - matches [the cursor position][4].
 * `root` - highlights the whole command line [if the current user is root][5].
 * `line` - applied to [the whole command line][6].

 [1]: highlighters/main.md
 [2]: highlighters/brackets.md
 [3]: highlighters/pattern.md
 [4]: highlighters/cursor.md
 [5]: highlighters/root.md
 [6]: highlighters/line.md


 Highlighter-independent settings
 --------------------------------

 By default, all command lines are highlighted.  However, it is possible to
 prevent command lines longer than a fixed number of characters from being
 highlighted by setting the variable `${ZSH_HIGHLIGHT_MAXLENGTH}` to the maximum
 length (in characters) of command lines to be highlighter.  This is useful when
 editing very long comand lines (for example, with the [`fned`][fned] utility
 function).  Example:

 [fned]: http://zsh.sourceforge.net/Doc/Release/User-Contributions.html#index-zed

 ```zsh
 ZSH_HIGHLIGHT_MAXLENGTH=512
 ```


 How to activate highlighters
 ----------------------------

 To activate an highlighter, add it to the `ZSH_HIGHLIGHT_HIGHLIGHTERS` array in
 `~/.zshrc`, for example:

 ```zsh
 ZSH_HIGHLIGHT_HIGHLIGHTERS=(main brackets pattern cursor)
 ```

 By default, `$ZSH_HIGHLIGHT_HIGHLIGHTERS` is unset and only the `main`
 highlighter is active.


 How to tweak highlighters
 -------------------------

 Highlighters look up styles from the `ZSH_HIGHLIGHT_STYLES` associative array.
 Navigate into the [individual highlighters' documentation](highlighters/) to
 see what styles (keys) each highlighter defines; the syntax for values is the
 same as the syntax of "types of highlighting" of the zsh builtin
 `$zle_highlight` array, which is documented in [the `zshzle(1)` manual
 page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting

 Some highlighters support additional configuration parameters; see each
 highlighter's documentation for details and examples.


 How to implement a new highlighter
 ----------------------------------

 To create your own `acme` highlighter:

 * Create your script at
    `highlighters/acme/acme-highlighter.zsh`.

 * Implement the `_zsh_highlight_highlighter_acme_predicate` function.
  This function must return 0 when the highlighter needs to be called and
  non-zero otherwise, for example:

    ```zsh
    _zsh_highlight_highlighter_acme_predicate() {
      # Call this highlighter in SVN working copies
      [[ -d .svn ]]
    }
    ```

 * Implement the `_zsh_highlight_highlighter_acme_paint` function.
  This function does the actual syntax highlighting, by calling
  `_zsh_highlight_add_highlight` with the start and end of the region to
  be highlighted and the `ZSH_HIGHLIGHT_STYLES` key to use. Define the default
  style for that key in the highlighter script outside of any function with
  `: ${ZSH_HIGHLIGHT_STYLES[key]:=value}`, being sure to prefix
  the key with your highlighter name and a colon. For example:

    ```zsh
    : ${ZSH_HIGHLIGHT_STYLES[acme:aurora]:=fg=green}

    _zsh_highlight_highlighter_acme_paint() {
      # Colorize the whole buffer with the 'aurora' style
      _zsh_highlight_add_highlight 0 $#BUFFER acme:aurora
    }
    ```

  If you need to test which options the user has set, test `zsyh_user_options`
  with a sensible default if the option is not present in supported zsh
  versions. For example:

    ```zsh
    [[ ${zsyh_user_options[ignoreclosebraces]:-off} == on ]]
    ```

  The option name must be all lowercase with no underscores and not an alias.

 * Name your own functions and global variables `_zsh_highlight_acme_*`.

    - In zsh-syntax-highlighting 0.4.0 and earlier, the entrypoints 
        `_zsh_highlight_highlighter_acme_predicate` and
        `_zsh_highlight_highlighter_acme_paint`
        were named
        `_zsh_highlight_acme_highlighter_predicate` and
        `_zsh_highlight_highlighter_acme_paint` respectively.

        These names are still supported for backwards compatibility;
        however, support for them will be removed in a future major or minor release (v0.x.0 or v1.0.0).

 * Activate your highlighter in `~/.zshrc`:

    ```zsh
    ZSH_HIGHLIGHT_HIGHLIGHTERS+=(acme)
    ```

 * [Write tests](../tests/README.md).
--- a/.zsh/fsh/docs/highlighters/brackets.md
+++ b/.zsh/fsh/docs/highlighters/brackets.md
@ -0,0 +1,31 @@
 zsh-syntax-highlighting / highlighters / brackets
 -------------------------------------------------

 This is the `brackets` highlighter, that highlights brackets and parentheses, and
 matches them.


 ### How to tweak it

 This highlighter defines the following styles:

 * `bracket-error` - unmatched brackets
 * `bracket-level-N` - brackets with nest level N
 * `cursor-matchingbracket` - the matching bracket, if cursor is on a bracket

 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
 for example in `~/.zshrc`:

 ```zsh
 # To define styles for nested brackets up to level 4
 ZSH_HIGHLIGHT_STYLES[bracket-level-1]='fg=blue,bold'
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]='fg=red,bold'
 ZSH_HIGHLIGHT_STYLES[bracket-level-3]='fg=yellow,bold'
 ZSH_HIGHLIGHT_STYLES[bracket-level-4]='fg=magenta,bold'
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/docs/highlighters/cursor.md
+++ b/.zsh/fsh/docs/highlighters/cursor.md
@ -0,0 +1,24 @@
 zsh-syntax-highlighting / highlighters / cursor
 -----------------------------------------------

 This is the `cursor` highlighter, that highlights the cursor.


 ### How to tweak it

 This highlighter defines the following styles:

 * `cursor` - the style for the current cursor position

 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
 for example in `~/.zshrc`:

 ```zsh
 ZSH_HIGHLIGHT_STYLES[cursor]='bg=blue'
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/docs/highlighters/line.md
+++ b/.zsh/fsh/docs/highlighters/line.md
@ -0,0 +1,24 @@
 zsh-syntax-highlighting / highlighters / line
 ---------------------------------------------

 This is the `line` highlighter, that highlights the whole line.


 ### How to tweak it

 This highlighter defines the following styles:

 * `line` - the style for the whole line

 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
 for example in `~/.zshrc`:

 ```zsh
 ZSH_HIGHLIGHT_STYLES[line]='bold'
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/docs/highlighters/main.md
+++ b/.zsh/fsh/docs/highlighters/main.md
@ -0,0 +1,121 @@
 zsh-syntax-highlighting / highlighters / main
 ---------------------------------------------

 This is the `main` highlighter, that highlights:

 * Commands
 * Options
 * Arguments
 * Paths
 * Strings

 This highlighter is active by default.


 ### How to tweak it

 This highlighter defines the following styles:

 * `unknown-token` - unknown tokens / errors
 * `reserved-word` - shell reserved words (`if`, `for`)
 * `alias` - aliases
 * `suffix-alias` - suffix aliases (requires zsh 5.1.1 or newer)
 * `global-alias` - global aliases
 * `builtin` - shell builtin commands (`shift`, `pwd`, `zstyle`)
 * `function` - function names
 * `command` - command names
 * `precommand` - precommand modifiers (e.g., `noglob`, `builtin`)
 * `commandseparator` - command separation tokens (`;`, `&&`)
 * `hashed-command` - hashed commands
 * `autodirectory` - a directory name in command position when the `AUTO_CD` option is set
 * `path` - existing filenames
 * `path_pathseparator` - path separators in filenames (`/`); if unset, `path` is used (default)
 * `path_prefix` - prefixes of existing filenames
 * `path_prefix_pathseparator` - path separators in prefixes of existing filenames (`/`); if unset, `path_prefix` is used (default)
 * `globbing` - globbing expressions (`*.txt`)
 * `history-expansion` - history expansion expressions (`!foo` and `^foo^bar`)
 * `command-substitution` - command substitutions (`$(echo foo)`)
 * `command-substitution-unquoted` - an unquoted command substitution (`$(echo foo)`)
 * `command-substitution-quoted` - a quoted command substitution (`"$(echo foo)"`)
 * `command-substitution-delimiter` - command substitution delimiters (`$(` and `)`)
 * `command-substitution-delimiter-unquoted` - an unquoted command substitution delimiters (`$(` and `)`)
 * `command-substitution-delimiter-quoted` - a quoted command substitution delimiters (`"$(` and `)"`)
 * `process-substitution` - process substitutions (`<(echo foo)`)
 * `process-substitution-delimiter` - process substitution delimiters (`<(` and `)`)
 * `arithmetic-expansion` - arithmetic expansion `$(( 42 ))`)
 * `single-hyphen-option` - single-hyphen options (`-o`)
 * `double-hyphen-option` - double-hyphen options (`--option`)
 * `back-quoted-argument` - backtick command substitution (`` `foo` ``)
 * `back-quoted-argument-unclosed` - unclosed backtick command substitution (`` `foo ``)
 * `back-quoted-argument-delimiter` - backtick command substitution delimiters (`` ` ``)
 * `single-quoted-argument` - single-quoted arguments (`` 'foo' ``)
 * `single-quoted-argument-unclosed` - unclosed single-quoted arguments (`` 'foo ``)
 * `double-quoted-argument` - double-quoted arguments (`` "foo" ``)
 * `double-quoted-argument-unclosed` - unclosed double-quoted arguments (`` "foo ``)
 * `dollar-quoted-argument` - dollar-quoted arguments (`` $'foo' ``)
 * `dollar-quoted-argument-unclosed` - unclosed dollar-quoted arguments (`` $'foo ``)
 * `rc-quote` - two single quotes inside single quotes when the `RC_QUOTES` option is set (`` 'foo''bar' ``)
 * `dollar-double-quoted-argument` - parameter expansion inside double quotes (`$foo` inside `""`)
 * `back-double-quoted-argument` -  backslash escape sequences inside double-quoted arguments (`\"` in `"foo\"bar"`)
 * `back-dollar-quoted-argument` -  backslash escape sequences inside dollar-quoted arguments (`\x` in `$'\x48'`)
 * `assign` - parameter assignments (`x=foo` and `x=( )`)
 * `redirection` - redirection operators (`<`, `>`, etc)
 * `comment` - comments, when `setopt INTERACTIVE_COMMENTS` is in effect (`echo # foo`)
 * `comment` - elided parameters in command position (`$x ls` when `$x` is unset or empty)
 * `named-fd` - named file descriptor (the `fd` in `echo foo {fd}>&2`)
 * `numeric-fd` - numeric file descriptor (the `2` in `echo foo {fd}>&2`)
 * `arg0` - a command word other than one of those enumerated above (other than a command, precommand, alias, function, or shell builtin command).
 * `default` - everything else

 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
 for example in `~/.zshrc`:

 ```zsh
 # Declare the variable
 typeset -A ZSH_HIGHLIGHT_STYLES

 # To differentiate aliases from other command types
 ZSH_HIGHLIGHT_STYLES[alias]='fg=magenta,bold'

 # To have paths colored instead of underlined
 ZSH_HIGHLIGHT_STYLES[path]='fg=cyan'

 # To disable highlighting of globbing expressions
 ZSH_HIGHLIGHT_STYLES[globbing]='none'
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 #### Parameters

 To avoid partial path lookups on a path, add the path to the `ZSH_HIGHLIGHT_DIRS_BLACKLIST` array.

 ```zsh
 ZSH_HIGHLIGHT_DIRS_BLACKLIST+=(/mnt/slow_share)
 ```

 ### Useless trivia

 #### Forward compatibility.

 zsh-syntax-highlighting attempts to be forward-compatible with zsh.
 Specifically, we attempt to facilitate highlighting _command word_ types that
 had not yet been invented when this version of zsh-syntax-highlighting was
 released.

 A _command word_ is something like a function name, external command name, et
 cetera.  (See
 [Simple Commands & Pipelines in `zshmisc(1)`][zshmisc-Simple-Commands-And-Pipelines]
 for a formal definition.)

 If a new _kind_ of command word is ever added to zsh — something conceptually
 different than "function" and "alias" and "external command" — then command words
 of that (new) kind will be highlighted by the style `arg0_$kind`,
 where `$kind` is the output of `type -w` on the new kind of command word.  If that
 style is not defined, then the style `arg0` will be used instead.

 [zshmisc-Simple-Commands-And-Pipelines]: http://zsh.sourceforge.net/Doc/Release/Shell-Grammar.html#Simple-Commands-_0026-Pipelines

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/docs/highlighters/pattern.md
+++ b/.zsh/fsh/docs/highlighters/pattern.md
@ -0,0 +1,24 @@
 zsh-syntax-highlighting / highlighters / pattern
 ------------------------------------------------

 This is the `pattern` highlighter, that highlights user-defined patterns.


 ### How to tweak it

 To use this highlighter, associate patterns with styles in the
 `ZSH_HIGHLIGHT_PATTERNS` associative array, for example in `~/.zshrc`:

 ```zsh
 # Declare the variable
 typeset -A ZSH_HIGHLIGHT_PATTERNS

 # To have commands starting with `rm -rf` in red:
 ZSH_HIGHLIGHT_PATTERNS+=('rm -rf *' 'fg=white,bold,bg=red')
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/docs/highlighters/regexp.md
+++ b/.zsh/fsh/docs/highlighters/regexp.md
@ -0,0 +1,30 @@
 zsh-syntax-highlighting / highlighters / regexp
 ------------------------------------------------

 This is the `regexp` highlighter, that highlights user-defined regular
 expressions. It's similar to the `pattern` highlighter, but allows more complex
 patterns.

 ### How to tweak it

 To use this highlighter, associate regular expressions with styles in the
 `ZSH_HIGHLIGHT_REGEXP` associative array, for example in `~/.zshrc`:

 ```zsh
 typeset -A ZSH_HIGHLIGHT_REGEXP
 ZSH_HIGHLIGHT_REGEXP+=('\bsudo\b' fg=123,bold)
 ```

 This will highlight "sudo" only as a complete word, i.e., "sudo cmd", but not
 "sudoedit"

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 See also: [regular expressions tutorial][perlretut], zsh regexp operator `=~`
 in [the `zshmisc(1)` manual page][zshmisc-Conditional-Expressions]

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
 [perlretut]: http://perldoc.perl.org/perlretut.html
 [zshmisc-Conditional-Expressions]: http://zsh.sourceforge.net/Doc/Release/Conditional-Expressions.html#Conditional-Expressions
--- a/.zsh/fsh/docs/highlighters/root.md
+++ b/.zsh/fsh/docs/highlighters/root.md
@ -0,0 +1,25 @@
 zsh-syntax-highlighting / highlighters / root
 ---------------------------------------------

 This is the `root` highlighter, that highlights the whole line if the current
 user is root.


 ### How to tweak it

 This highlighter defines the following styles:

 * `root` - the style for the whole line if the current user is root.

 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
 for example in `~/.zshrc`:

 ```zsh
 ZSH_HIGHLIGHT_STYLES[root]='bg=red'
 ```

 The syntax for values is the same as the syntax of "types of highlighting" of
 the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
 manual page][zshzle-Character-Highlighting].

 [zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
--- a/.zsh/fsh/highlighters/README.md
+++ b/.zsh/fsh/highlighters/README.md
@ -0,0 +1,8 @@
 zsh-syntax-highlighting / highlighters
 ======================================

 Navigate into the individual highlighters' documentation to see
 what styles (`$ZSH_HIGHLIGHT_STYLES` keys) each highlighter defines.

 Refer to the [documentation on highlighters](../docs/highlighters.md) for further
 information.
--- a/.zsh/fsh/highlighters/brackets/README.md
+++ b/.zsh/fsh/highlighters/brackets/README.md
@ -0,0 +1 @@
 ../../docs/highlighters/brackets.md
--- a/.zsh/fsh/highlighters/brackets/brackets-highlighter.zsh
+++ b/.zsh/fsh/highlighters/brackets/brackets-highlighter.zsh
@ -0,0 +1,107 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2010-2017 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------


 # Define default styles.
 : ${ZSH_HIGHLIGHT_STYLES[bracket-error]:=fg=red,bold}
 : ${ZSH_HIGHLIGHT_STYLES[bracket-level-1]:=fg=blue,bold}
 : ${ZSH_HIGHLIGHT_STYLES[bracket-level-2]:=fg=green,bold}
 : ${ZSH_HIGHLIGHT_STYLES[bracket-level-3]:=fg=magenta,bold}
 : ${ZSH_HIGHLIGHT_STYLES[bracket-level-4]:=fg=yellow,bold}
 : ${ZSH_HIGHLIGHT_STYLES[bracket-level-5]:=fg=cyan,bold}
 : ${ZSH_HIGHLIGHT_STYLES[cursor-matchingbracket]:=standout}

 # Whether the brackets highlighter should be called or not.
 _zsh_highlight_highlighter_brackets_predicate()
 {
  [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_cursor_moved || _zsh_highlight_buffer_modified
 }

 # Brackets highlighting function.
 _zsh_highlight_highlighter_brackets_paint()
 {
  local char style
  local -i bracket_color_size=${#ZSH_HIGHLIGHT_STYLES[(I)bracket-level-*]} buflen=${#BUFFER} level=0 matchingpos pos
  local -A levelpos lastoflevel matching

  # Find all brackets and remember which one is matching
  pos=0
  for char in ${(s..)BUFFER} ; do
    (( ++pos ))
    case $char in
      ["([{"])
        levelpos[$pos]=$((++level))
        lastoflevel[$level]=$pos
        ;;
      [")]}"])
        if (( level > 0 )); then
          matchingpos=$lastoflevel[$level]
          levelpos[$pos]=$((level--))
          if _zsh_highlight_brackets_match $matchingpos $pos; then
            matching[$matchingpos]=$pos
            matching[$pos]=$matchingpos
          fi
        else
          levelpos[$pos]=-1
        fi
        ;;
    esac
  done

  # Now highlight all found brackets
  for pos in ${(k)levelpos}; do
    if (( $+matching[$pos] )); then
      if (( bracket_color_size )); then
        _zsh_highlight_add_highlight $((pos - 1)) $pos bracket-level-$(( (levelpos[$pos] - 1) % bracket_color_size + 1 ))
      fi
    else
      _zsh_highlight_add_highlight $((pos - 1)) $pos bracket-error
    fi
  done

  # If cursor is on a bracket, then highlight corresponding bracket, if any.
  if [[ $WIDGET != zle-line-finish ]]; then
    pos=$((CURSOR + 1))
    if (( $+levelpos[$pos] )) && (( $+matching[$pos] )); then
      local -i otherpos=$matching[$pos]
      _zsh_highlight_add_highlight $((otherpos - 1)) $otherpos cursor-matchingbracket
    fi
  fi
 }

 # Helper function to differentiate type 
 _zsh_highlight_brackets_match()
 {
  case $BUFFER[$1] in
    \() [[ $BUFFER[$2] == \) ]];;
    \[) [[ $BUFFER[$2] == \] ]];;
    \{) [[ $BUFFER[$2] == \} ]];;
    *) false;;
  esac
 }
--- a/.zsh/fsh/highlighters/brackets/test-data/cursor-matchingbracket-line-finish.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/cursor-matchingbracket-line-finish.zsh
@ -0,0 +1,36 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 WIDGET=zle-line-finish

 BUFFER=': $foo[bar]'
 CURSOR=6 # cursor is zero-based

 expected_region_highlight=(
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/cursor-matchingbracket.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/cursor-matchingbracket.zsh
@ -0,0 +1,47 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-3]=

 BUFFER=': ((( )))'
 CURSOR=2 # cursor is zero-based

 expected_region_highlight=(
  "3 3 bracket-level-1"
  "4 4 bracket-level-2"
  "5 5 bracket-level-3"
  "7 7 bracket-level-3"
  "8 8 bracket-level-2"
  "9 9 bracket-level-1"
  "9 9 cursor-matchingbracket"
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/empty-styles.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/empty-styles.zsh
@ -0,0 +1,33 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=': (x)'

 expected_region_highlight=(
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/loop-styles.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/loop-styles.zsh
@ -0,0 +1,53 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-3]=

 BUFFER=': ({[({[(x)]})]})'

 expected_region_highlight=(
  "3  3  bracket-level-1"
  "4  4  bracket-level-2"
  "5  5  bracket-level-3"
  "6  6  bracket-level-1"
  "7  7  bracket-level-2"
  "8  8  bracket-level-3"
  "9  9  bracket-level-1"
  "11 11 bracket-level-1"
  "12 12 bracket-level-3"
  "13 13 bracket-level-2"
  "14 14 bracket-level-1"
  "15 15 bracket-level-3"
  "16 16 bracket-level-2"
  "17 17 bracket-level-1"
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/mismatch-patentheses.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/mismatch-patentheses.zsh
@ -0,0 +1,42 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=

 BUFFER='echo ({x}]'

 expected_region_highlight=(
  "6  6  bracket-error" # (
  "7  7  bracket-level-2" # {
  "9  9  bracket-level-2" # }
  "10 10 bracket-error" # )
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/near-quotes.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/near-quotes.zsh
@ -0,0 +1,42 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=

 BUFFER=': {"{x}"}'

 expected_region_highlight=(
  "3 3 bracket-level-1"
  "5 5 bracket-level-2"
  "7 7 bracket-level-2"
  "9 9 bracket-level-1"
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/nested-parentheses.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/nested-parentheses.zsh
@ -0,0 +1,45 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-3]=

 BUFFER='echo $(echo ${(z)array})'

 expected_region_highlight=(
  "7  7  bracket-level-1" # (
  "14 14 bracket-level-2" # {
  "15 15 bracket-level-3" # (
  "17 17 bracket-level-3" # )
  "23 23 bracket-level-2" # }
  "24 24 bracket-level-1" # )
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/only-error.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/only-error.zsh
@ -0,0 +1,34 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2017 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=': x)'

 expected_region_highlight=(
  "4 4 bracket-error" # )
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/quoted-patentheses.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/quoted-patentheses.zsh
@ -0,0 +1,34 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER='echo "foo ( bar"'

 expected_region_highlight=(
 "11 11 bracket-error"
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/simple-parentheses.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/simple-parentheses.zsh
@ -0,0 +1,42 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=

 BUFFER='echo ({x})'

 expected_region_highlight=(
  "6  6  bracket-level-1" # (
  "7  7  bracket-level-2" # {
  "9  9  bracket-level-2" # }
  "10 10 bracket-level-1" # )
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/unclosed-patentheses.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/unclosed-patentheses.zsh
@ -0,0 +1,41 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=
 ZSH_HIGHLIGHT_STYLES[bracket-level-2]=

 BUFFER='echo ({x}'

 expected_region_highlight=(
  "6  6  bracket-error" # (
  "7  7  bracket-level-2" # {
  "9  9  bracket-level-2" # }
 )
--- a/.zsh/fsh/highlighters/brackets/test-data/unclosed-patentheses2.zsh
+++ b/.zsh/fsh/highlighters/brackets/test-data/unclosed-patentheses2.zsh
@ -0,0 +1,40 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 unsorted=1

 ZSH_HIGHLIGHT_STYLES[bracket-level-1]=

 BUFFER='echo {x})'

 expected_region_highlight=(
  "6  6  bracket-level-1" # {
  "8  8  bracket-level-1" # }
  "9  9 bracket-error" # )
 )
--- a/.zsh/fsh/highlighters/cursor/README.md
+++ b/.zsh/fsh/highlighters/cursor/README.md
@ -0,0 +1 @@
 ../../docs/highlighters/cursor.md
--- a/.zsh/fsh/highlighters/cursor/cursor-highlighter.zsh
+++ b/.zsh/fsh/highlighters/cursor/cursor-highlighter.zsh
@ -0,0 +1,47 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------


 # Define default styles.
 : ${ZSH_HIGHLIGHT_STYLES[cursor]:=standout}

 # Whether the cursor highlighter should be called or not.
 _zsh_highlight_highlighter_cursor_predicate()
 {
  # remove cursor highlighting when the line is finished
  [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_cursor_moved
 }

 # Cursor highlighting function.
 _zsh_highlight_highlighter_cursor_paint()
 {
  [[ $WIDGET == zle-line-finish ]] && return
  
  _zsh_highlight_add_highlight $CURSOR $(( $CURSOR + 1 )) cursor
 }
--- a/.zsh/fsh/highlighters/line/README.md
+++ b/.zsh/fsh/highlighters/line/README.md
@ -0,0 +1 @@
 ../../docs/highlighters/line.md
--- a/.zsh/fsh/highlighters/line/line-highlighter.zsh
+++ b/.zsh/fsh/highlighters/line/line-highlighter.zsh
@ -0,0 +1,44 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------


 # Define default styles.
 : ${ZSH_HIGHLIGHT_STYLES[line]:=}

 # Whether the root highlighter should be called or not.
 _zsh_highlight_highlighter_line_predicate()
 {
  _zsh_highlight_buffer_modified
 }

 # root highlighting function.
 _zsh_highlight_highlighter_line_paint()
 {
  _zsh_highlight_add_highlight 0 $#BUFFER line
 }
--- a/.zsh/fsh/highlighters/main/README.md
+++ b/.zsh/fsh/highlighters/main/README.md
@ -0,0 +1 @@
 ../../docs/highlighters/main.md
--- a/.zsh/fsh/highlighters/main/main-highlighter.zsh
+++ b/.zsh/fsh/highlighters/main/main-highlighter.zsh
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position1.zsh
@ -0,0 +1,35 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'/'

 expected_region_highlight=(
  '1 1 path_prefix' # /
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position1b.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position1b.zsh
@ -0,0 +1,36 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 setopt autocd
 BUFFER=$'/'

 expected_region_highlight=(
  '1 1 autodirectory' # /
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position2.zsh
@ -0,0 +1,35 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'/bi'

 expected_region_highlight=(
  '1 3 path_prefix' # /bi
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position3.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position3.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'/bin; /bin'

 expected_region_highlight=(
  '1 4 unknown-token' # /bin (in middle)
  '5 5 commandseparator' # ;
  '7 10 path_prefix' # /bin (at end)
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position3b.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position3b.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 setopt autocd
 BUFFER=$'/bin; /bin'

 expected_region_highlight=(
  '1 4 autodirectory' # /bin (in middle)
  '5 5 commandseparator' # ;
  '7 10 autodirectory' # /bin (at end)
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position4.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position4.zsh
@ -0,0 +1,35 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'/bin/s'

 expected_region_highlight=(
  '1 6 path_prefix' # /bin/s
 )
--- a/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position5.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/abspath-in-command-position5.zsh
@ -0,0 +1,35 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'/bin/sh'

 expected_region_highlight=(
  '1 7 command' # /bin/sh
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-assignment1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-assignment1.zsh
@ -0,0 +1,38 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # Issue #263 (more-pathological case): aliases[x=y]=z works; the ${(z)} splitter considers
 # that a single word; but it's not looked up as an alias.  Hence, highlight it as an error.
 aliases[x=y]='lorem ipsum dolor sit amet'
 BUFFER='x=y ls'

 expected_region_highlight=(
  "1 3 unknown-token" # x=y
  "5 6 default" # ls
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-basic.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-basic.zsh
@ -0,0 +1,35 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias foo="echo hello world"
 BUFFER="foo"

 expected_region_highlight+=(
  "1 3 alias" # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-brackets.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-brackets.zsh
@ -0,0 +1,41 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2021 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # Have to use cat here as it must be a command that exists.
 # Otherwise, the test would fail with the first token being recognized
 # as an "unknown-token".
 alias ]=cat

 BUFFER='] /'

 expected_region_highlight=(
  '1 1 alias' # ]
  '3 3 path' # /
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-command-substitution.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-command-substitution.zsh
@ -0,0 +1,37 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # Alias must be at least 4 characters to test the regression
 # cf. 139ea2b189819c43cc251825981c116959b15cc3
 alias foobar='echo "$(echo foobar)"'
 BUFFER='foobar'

 expected_region_highlight=(
  "1 6 alias" # foobar
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-comment1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-comment1.zsh
@ -0,0 +1,37 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # see alias-comment2.zsh and comment-followed.zsh
 setopt interactivecomments
 alias x=$'# foo\npwd'
 BUFFER='x'

 expected_region_highlight=(
  '1 1 alias' # x
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-comment2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-comment2.zsh
@ -0,0 +1,37 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # see alias-comment1.zsh
 setopt NO_interactivecomments
 alias x=$'# foo\npwd'
 BUFFER='x'

 expected_region_highlight=(
  '1 1 unknown-token' # x (#)
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-complex.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-complex.zsh
@ -0,0 +1,38 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias x='echo && ls; >'

 BUFFER='x file echo'

 expected_region_highlight=(
  '1 1 alias' # x
  '3 6 default' # file
  '8 11 builtin' # echo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-empty.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-empty.zsh
@ -0,0 +1,38 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias x=''

 BUFFER='x echo foo'

 expected_region_highlight=(
  '1 1 alias' # x
  '3 6 builtin' # echo
  '8 10 default' # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-eponymous1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-eponymous1.zsh
@ -0,0 +1,36 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias ls='command ls'

 BUFFER='ls'

 expected_region_highlight=(
  "1 2 alias" # ls
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-eponymous2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-eponymous2.zsh
@ -0,0 +1,36 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias ls=tmp tmp='command ls'

 BUFFER='ls'

 expected_region_highlight=(
  "1 2 alias" # ls
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-in-cmdsubst.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-in-cmdsubst.zsh
@ -0,0 +1,43 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias p='print -r --'

 BUFFER=$'s=$(p foo)'

 expected_region_highlight=(
  '1 10 assign' # s=$(p foo)
  '3 10 default' # $(p foo)
  '3 10 command-substitution-unquoted' # $(p foo)
  '3 4 command-substitution-delimiter-unquoted' # $(
  '5 5 alias' # p
  '7 9 default' # foo
  '10 10 command-substitution-delimiter-unquoted' # )
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-loop.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-loop.zsh
@ -0,0 +1,44 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 function b() {} # beware of ALIAS_FUNC_DEF
 alias a=b b=c c=b

 BUFFER='a foo; :'

 expected_region_highlight=(
  # An alias is ineligible for expansion whilst it's being expanded.
  # Therefore, the "b" in the expansion of the alias "c" is not considered
  # as an alias.
  '1 1 alias' # a
  '3 5 default' # foo
  '6 6 commandseparator' # ;
  '8 8 builtin' # :
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-loop2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-loop2.zsh
@ -0,0 +1,35 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias ls="ls"
 BUFFER="ls"

 expected_region_highlight+=(
  "1 2 alias" # ls
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-nested-precommand.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-nested-precommand.zsh
@ -0,0 +1,43 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=b b=sudo
 sudo(){}

 BUFFER='a -u phy1729 echo; :'

 expected_region_highlight=(
  '1 1 alias' # a
  '3 4 single-hyphen-option' # -u
  '6 12 default' # phy1729
  '14 17 builtin' # echo
  '18 18 commandseparator' # ;
  '20 20 builtin' # :
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-nested.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-nested.zsh
@ -0,0 +1,40 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=b b=:

 BUFFER='a foo; :'

 expected_region_highlight=(
  '1 1 alias' # a
  '3 5 default' # foo
  '6 6 commandseparator' # ;
  '8 8 builtin' # :
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-parameter.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-parameter.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias '$foo'='echo alias'
 local foo; foo=(echo param)

 BUFFER='$foo'

 expected_region_highlight=(
  '1 4 alias' # $foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument1.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # See also param-precommand-option-argument1.zsh
 alias sudo_u='sudo -u'
 sudo(){}

 BUFFER='sudo_u phy1729 echo foo'

 expected_region_highlight=(
  '1 6 alias' # sudo_u
  '8 14 default' # phy1729
  '17 19 command "issue #540"' # echo (not builtin)
  '21 23 default' # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument2.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias sudo_b='sudo -b'
 alias sudo_b_u='sudo_b -u'
 sudo(){}

 BUFFER='sudo_b_u phy1729 echo foo'

 expected_region_highlight=(
  '1 8 alias' # sudo_b_u
  '10 16 default' # phy1729
  '18 21 command "issue #540"' # echo (not builtin)
  '23 25 default' # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument3.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument3.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # See also param-precommand-option-argument3.zsh
 alias sudo_u='sudo -u'
 sudo(){}

 BUFFER='sudo_u phy1729 ls foo'

 expected_region_highlight=(
  '1 6 alias' # sudo_u
  '8 14 default' # phy1729
  '16 17 command' # ls
  '19 21 default' # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument4.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-precommand-option-argument4.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias sudo_b='sudo -b'
 alias sudo_b_u='sudo_b -u'
 sudo(){}

 BUFFER='sudo_b_u phy1729 ls foo'

 expected_region_highlight=(
  '1 8 alias' # sudo_b_u
  '10 16 default' # phy1729
  '18 19 command' # ls
  '21 23 default' # foo
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-quoted.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-quoted.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) YYYY zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: ls='ls -l'
 BUFFER='"a" foo; \ls'

 expected_region_highlight=(
  '1 3 unknown-token' # "a"
  '5 7 default' # foo
  '8 8 commandseparator' # ;
  '10 12 command' # \ls
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-redirect.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-redirect.zsh
@ -0,0 +1,38 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias x=\>
 BUFFER='x foo echo bar'

 expected_region_highlight=(
  '1 1 alias' # x
  '3 5 default' # foo
  '7 10 builtin' # echo
  '12 14 default' # bar
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-reuse1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-reuse1.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: b='a | a'

 BUFFER='b | b'

 expected_region_highlight=(
  '1 1 alias' # b
  '3 3 commandseparator' # |
  '5 5 alias' # b
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-reuse2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-reuse2.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: b='a && a'

 BUFFER='b && b'

 expected_region_highlight=(
  '1 1 alias' # b
  '3 4 commandseparator' # &&
  '6 6 alias' # b
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-reuse3.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-reuse3.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: b='a; a'

 BUFFER='b; b'

 expected_region_highlight=(
  '1 1 alias' # b
  '2 2 commandseparator' # ;
  '4 4 alias' # b
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-reuse4.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-reuse4.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: b='a $(a)'

 BUFFER='b $(b)'

 expected_region_highlight=(
  '1 1 alias' # b
  '3 6 default' # $(b)
  '3 6 command-substitution-unquoted' # $(b)
  '3 4 command-substitution-delimiter-unquoted' # $(
  '5 5 alias' # b
  '6 6 command-substitution-delimiter-unquoted' # )
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-reuse5.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-reuse5.zsh
@ -0,0 +1,43 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=: b='a < <(a)'

 BUFFER='b < <(b)'

 expected_region_highlight=(
  '1 1 alias' # b
  '3 3 redirection' # <
  '5 8 default' # <(b)
  '5 8 process-substitution' # <(b)
  '5 6 process-substitution-delimiter' # <(
  '7 7 alias' # b
  '8 8 process-substitution-delimiter' # )
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-self.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-self.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias echo='echo foo'

 BUFFER='echo bar'

 expected_region_highlight=(
  '1 4 alias' # echo
  '6 8 default' # bar
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-self2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-self2.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias cat='cat | cat'

 BUFFER='cat'

 expected_region_highlight=(
  '1 3 alias' # cat
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-to-dir.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-to-dir.zsh
@ -0,0 +1,36 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2018 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias x=/
 BUFFER=$'x'

 expected_region_highlight=(
  '1 1 unknown-token' # x (/)
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-to-dir1b.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-to-dir1b.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 setopt autocd
 alias x=/
 BUFFER=$'x'

 expected_region_highlight=(
  '1 1 alias' # x
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-unknown-token1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-unknown-token1.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a=b b=foo

 BUFFER='a '

 expected_region_highlight=(
  '1 1 unknown-token' # a
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias-unknown-token2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias-unknown-token2.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2019 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias a='() { ls "$@" ; foo }'

 BUFFER='a '

 expected_region_highlight=(
  '1 1 unknown-token' # a
 )
--- a/.zsh/fsh/highlighters/main/test-data/alias.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/alias.zsh
@ -0,0 +1,53 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 alias alias1="ls"
 alias -s alias2="echo"
 function alias1() {} # to check that it's highlighted as an alias, not as a function

 BUFFER='x.alias2; alias1; alias2'

 # Set expected_region_highlight as a function of zsh version.
 #
 # Highlight of suffix alias requires zsh-5.1.1 or newer; see issue #126,
 # and commit 36403 to zsh itself.  Therefore, check if the requisite zsh
 # functionality is present, and skip verifying suffix-alias highlighting
 # if it isn't.
 expected_region_highlight=()
 if zmodload -e zsh/parameter || [[ "$(type -w x.alias2)" == *suffix* ]]; then
  expected_region_highlight+=(
    "1 8 suffix-alias" # x.alias2
  )
 fi
 expected_region_highlight+=(
  "9 9 commandseparator" # ;
  "11 16 alias" # alias1
  "17 17 commandseparator" # ;
  "19 24 unknown-token" # alias2
 )
--- a/.zsh/fsh/highlighters/main/test-data/always1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/always1.zsh
@ -0,0 +1,41 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER='{ ls } always { pwd }'

 expected_region_highlight=(
  '1 1 reserved-word' # {
  '3 4 command' # ls
  '6 6 reserved-word' # }
  '8 13 reserved-word' # always
  '15 15 reserved-word' # {
  '17 19 builtin' # pwd
  '21 21 reserved-word' # }
 )
--- a/.zsh/fsh/highlighters/main/test-data/always2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/always2.zsh
@ -0,0 +1,43 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$'{\nls\n} always { pwd }'

 expected_region_highlight=(
  '1 1 reserved-word' # {
  '2 2 commandseparator' # \n
  '3 4 command' # ls
  '5 5 commandseparator' # \n
  '6 6 reserved-word' # }
  '8 13 reserved-word' # always
  '15 15 reserved-word' # {
  '17 19 builtin' # pwd
  '21 21 reserved-word' # }
 )
--- a/.zsh/fsh/highlighters/main/test-data/always3.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/always3.zsh
@ -0,0 +1,43 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 setopt ignorebraces
 BUFFER='echo { foo } always { bar }'

 expected_region_highlight=(
  '1 4 builtin' # echo
  '6 6 default' # {
  '8 10 default' # foo
  '12 12 default' # }
  '14 19 default' # always
  '21 21 default' # {
  '23 25 default' # bar
  '27 27 default' # }
 )
--- a/.zsh/fsh/highlighters/main/test-data/anonymous-function.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/anonymous-function.zsh
@ -0,0 +1,44 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER='() echo hello; () { echo world } "argument"'

 expected_region_highlight=(
  "1 2 reserved-word" # ()
  "4 7 builtin" # echo
  "9 13 default" # hello
  "14 14 commandseparator" # ;
  "16 17 reserved-word" # ()
  "19 19 reserved-word" # {
  "21 24 builtin" # echo
  "26 30 default" # world
  "32 32 reserved-word" # }
  "34 43 default" # "argument"
  "34 43 double-quoted-argument" # "argument"
 )
--- a/.zsh/fsh/highlighters/main/test-data/arg0-colon.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arg0-colon.zsh
@ -0,0 +1,35 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2016 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=''\''x: /'

 expected_region_highlight=(
  '1 5 unknown-token' # \'x: /
 )
--- a/.zsh/fsh/highlighters/main/test-data/arith-cmdsubst-mess.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arith-cmdsubst-mess.zsh
@ -0,0 +1,46 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $((ls); (ls))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 15 default' # $((ls); (ls))
  '3 15 command-substitution-unquoted' # $((ls); (ls))
  '3 4 command-substitution-delimiter-unquoted' # $(
  '5 5 reserved-word' # (
  '6 7 command' # ls
  '8 8 reserved-word' # )
  '9 9 commandseparator' # ;
  '11 11 reserved-word' # (
  '12 13 command' # ls
  '14 14 reserved-word' # )
  '15 15 command-substitution-delimiter-unquoted' # )
 )
--- a/.zsh/fsh/highlighters/main/test-data/arith1.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arith1.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( 6 * 9 ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 14 default' # $(( 6 * 9 ))
  '3 14 arithmetic-expansion' # $(( 6 * 9 ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arith2.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arith2.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': "$(( 6 * 9 ))"'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 16 default' # "$(( 6 * 9 ))"
  '3 16 double-quoted-argument' # "$(( 6 * 9 ))"
  '4 15 arithmetic-expansion' # $(( 6 * 9 ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-command-substitution.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-command-substitution.zsh
@ -0,0 +1,42 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( $(echo 2) + 2 ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 22 default' # $(( $(echo 2) + 2 ))
  '3 22 arithmetic-expansion' # $(( $(echo 2) + 2 ))
  '7 15 command-substitution-quoted' # $(echo 2)
  '7 8 command-substitution-delimiter-quoted' # $(
  '9 12 builtin' # echo
  '14 14 default' # 2
  '15 15 command-substitution-delimiter' # )
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-doubled-parens.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-doubled-parens.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( ((42)) ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 15 default' # $(( ((42)) ))
  '3 15 arithmetic-expansion' # $(( ((42)) ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-empty.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-empty.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': "foo"$(())"bar"'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 17 default' # "foo"$(())"bar"
  '3 7 double-quoted-argument' # "foo"
  '8 12 arithmetic-expansion' # $(())
  '13 17 double-quoted-argument' # "bar"
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-evaluation.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-evaluation.zsh
@ -0,0 +1,40 @@
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 # Must be at command word, since the word following 'if' isn't currently considered
 # a command word (issue #207).
 #
 # An opening '((' without matching '))' is highlighted correctly under zsh-5.1.1-52-g4bed2cf
 # or newer, only (issue #188).
 BUFFER='(( x == 42 ))'

 expected_region_highlight=(
  "1 2 reserved-word" # ((
  "12 13 reserved-word" # ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-hist-expn.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-hist-expn.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( \!\! ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 11 default' # $(( !! ))
  '3 11 arithmetic-expansion' # $(( !! ))
  '7 8 history-expansion "issue #713"' # !!
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-invalid-chars.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-invalid-chars.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( 0 * 1\'\'000 ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 19 default' # $(( 0 * 1\'\'000 ))
  '3 19 arithmetic-expansion' # $(( 0 * 1\'\'000 ))
  '12 12 unknown-token' # \'
  '13 13 unknown-token' # \'
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-multiplication.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-multiplication.zsh
@ -0,0 +1,39 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': foo*$(( 42 * 1729 ))*bar'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 26 default' # foo*$(( 42 * 1729 ))*bar
  '6 6 globbing' # *
  '7 22 arithmetic-expansion' # $(( 42 * 1729 ))
  '23 23 globbing' # *
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-nested.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-nested.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( $(( 1 + 2 )) * 3 ))'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 25 default' # $(( $(( 1 + 2 )) * 3 ))
  '3 25 arithmetic-expansion' # $(( $(( 1 + 2 )) * 3 ))
  '7 18 arithmetic-expansion' # $(( 1 + 2 ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-quoted.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-quoted.zsh
@ -0,0 +1,38 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': "$(( 1 + 1 ))"'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 16 default' # "$(( 1 + 1 ))"
  '3 16 double-quoted-argument' # "$(( 1 + 1 ))"
  '4 15 arithmetic-expansion' # $(( 1 + 1 ))
 )
--- a/.zsh/fsh/highlighters/main/test-data/arithmetic-unclosed.zsh
+++ b/.zsh/fsh/highlighters/main/test-data/arithmetic-unclosed.zsh
@ -0,0 +1,37 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
 # Copyright (c) 2020 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted
 # provided that the following conditions are met:
 #
 #  * Redistributions of source code must retain the above copyright notice, this list of conditions
 #    and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright notice, this list of
 #    conditions and the following disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
 #    may be used to endorse or promote products derived from this software without specific prior
 #    written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 # -------------------------------------------------------------------------------------------------
 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------

 BUFFER=$': $(( 1'

 expected_region_highlight=(
  '1 1 builtin' # :
  '3 7 default' # $(( 1
  '3 7 arithmetic-expansion' # $(( 1
 )