Add 'line' highlighter for the whole buffer

zle: don't override yank/yank-pop

`yank-pop` relies on the fact that the last zle command is `yank` or
`yank-pop` to work correctly. Rewriting them prevents this check to work
correctly breaking `yank-pop`.

This fix just disallow overriding of those two zle commands. As a
side-effect, syntax highlighting will not happen when using.

This fixes #99.

Update README.md

Edited links to Archlinux packages (the link to `zsh-syntax-highlighting-git` is out-of-date, and `zsh-syntax-highlighting` is now available in [community])

small change to find highlighting directory better

by extending the already in place mechanism of checking for the first
histchar to check for the second as well

Fix #121: sudo syntax highlighting incorrectly

Properly highlight array assignments

protect alias expansion from interpreting aliases as options

Do not leak a variable: cdpath_dir.

If one defines aliases like `++` the alias builtin tries to interprete these
as options so they have to be protected like this

    alias -- ++=true

The same goes for a call to `alias` in order to expand the alias again.

This code is more lenient than bash.  Examples:

    $ x[y[]=
    zsh: no matches found: x[y[]=
    $ x[][]=
    zsh: no matches found: x[][]=

The proper solution is to look inside the [...] and make sure that all
unescaped/unquoted square brackes are matched, but that is a heck of
a lot more complicated than this simple 8-character patch.

Zsh does not allow the variable name or the equals sign to be quoted or
escaped.  The previous code incorrectly highlighted the following
examples as assignments:

    $ 'x=y'
    zsh: command not found: x=y
    $ x\=y
    zsh: command not found: x=y
    $ "x"=y
    zsh: command not found: x=y
    $ \x=y
    zsh: command not found: x=y

Leaking a variable that holds a path in CDPATH could easily end up appearing on your prompt like `~cdpath_dir/subdir`.

Parse sudo command line in order to highlight the options correctly

Highlighted dollar variable ver. 2

Comments added

add separate path_prefix and path_approx hilights

Issue #92 Eliminates system bell errors on osx.

Update main-highlighter.zsh

Add support of CDPATH

Prepended an 'if' to remove error bell on osx systems.

Fix relative links in various project readmes

make $pattern local to _zsh_highlight_pattern_highlighter #97

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

Added sudo as a precommand

resolve issue #83

(Anyone knowing packages for other systems or wanting to create it,
please get in touch!)

make highlighting work for first entry in history. fixes #79