Done in c30301d474 and
c687bddea3 for other tests.

These tests are based on the patches contributed in those issues:

    commit 9d9df4fe80 (upstream/pr/167)
    Author:     Miciah Masters <miciah.masters@gmail.com>
    AuthorDate: Thu Apr 23 20:28:24 2015 -0400
    Commit:     Miciah Dashiel Butler Masters <mmasters@redhat.com>
    CommitDate: Thu Apr 23 20:28:24 2015 -0400

        Highlight comments

    M       highlighters/main/main-highlighter.zsh
    A       highlighters/main/test-data/comments.zsh

    commit d94f1a037f (upstream/pr/163)
    Author:     sonnym <michaud.sonny@gmail.com>
    AuthorDate: Fri Mar 6 18:27:57 2015 -0500
    Commit:     sonnym <michaud.sonny@gmail.com>
    CommitDate: Fri Mar 6 21:16:27 2015 -0500

        highlight comments when interactive_comments is on

    M       highlighters/main/main-highlighter.zsh
    A       highlighters/main/test-data/comment-embedded.zsh
    A       highlighters/main/test-data/comment-leading.zsh

Patch-by: sonnym <michaud.sonny@gmail.com>
Patch-by: Miciah Masters <miciah.masters@gmail.com>
(corrected and refreshed for harness changes by me)

Make the test pass by setting explicitly the global state (existing $HOME) it
depends on.  Test another value of the global state (a non-existing $HOME).

All these files should be sourced, not executed; and Debian's lintian complains:

W: zsh-syntax-highlighting: script-not-executable usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh

Signed-off-by: Takeshi Banse <takebi@laafc.net>

* Don't override user defined styles
* Better modularisation of highlighters
* Allow to define which highlighters are activated
* Allow to define the order in which they are defined
* Minor performance optimizations
* Fixed some variables leak
* Improve documentation
* Brackets highlighter: use ZSH_HIGHLIGHT_STYLES instead of a specific array

Feel free to add more test data !

Signed-off-by: Julien Nicoulaud <julien.nicoulaud@gmail.com>