The test passes so I'm adding it directly to master.

Just in case one of the interpolated variables contains a backslash.

Suggested-by: Matthew Martin

Makes the text easier to read ("_zsh_highlight_myhighlighter_highlighter" is
a mouthful).

Part of issue #329.

Merge remote-tracking branch 'danielshahaf/i267-linewise-region-v1'

* danielsh/i267-linewise-region-v1:
  tests: Add a regression test for issue #267, concerning highlighting a vi linewise region.
  Support linewise region.

Avoids a fork.

If the separator feature is disabled, this makes it possible to
change the main 'path' styles in a running session without the
need to touch the '_pathseparator' styles, too.

Instead, use the %N prompt expando, as suggested by Bart in users/21637.

Avoid the `print -P %N` syntax to save a fork on Cygwin, at the expense
of not supporting zsh's from 2001 through c. 2004 vintages.

Fixes #338.

Causes such expansions to be highlighted as [unknown-token] rather than as default (absent from $region_highlight).

Fixes #337.

Part of #337.

Merge remote-tracking branch 'upstream/pr/331'

* upstream/pr/331:
  'main': Try the "non-command word" codepath when a word may be either a command word or a non-command word.

Two instances.

* upstream/pr/319:
  tests: Extend issue #290 test with another variant.
  'main': Fix issue #290, «Mishighlights "longloops" 'repeat'».
  tests: New test for issue #290, «Mishighlights "longloops" 'repeat'».

Fixes #231.
Fixes #330.

Remove superfluous single quotes around the second hyphen.

Assignments to positional parameters using scalar assignment syntax is
a feature: it is covered by upstream's test suite ("append to positional
parameter" in Test/A06assign.ztst).

Merge remote-tracking branch 'upstream/pr/326'

* upstream/pr/326:
  'main': Internal cleanup: drop $style_override.

Conflicts:
	highlighters/main/main-highlighter.zsh (context lines only)

This commit is based on the work done by
Jorge Israel Peña (blaenk) in #136.

Changes:
* Adjusted to changes on the latest master branch.
* Use regular path highlighter colors by default.
* Break out early if the separator color is the same to
  improve performance.
* Tests.

Changes the interface of _zsh_highlight_main_highlighter_check_path().

Suggested-by: m0viefreak

If possible, try to use the zsh/parameter module to get
information about a shell words.

This avoids subshells and is a huge speed improvement
on systems such as cygwin.

Note 1:
$commands does not know about PATH_DIRS. So in case
PATH_DIRS is set, 'type -w' is still used if nothing
else matches.

Note 2:
zsh/parameter can't distinguish between 'command' and
'hashed'. Adjusted the test for that case to XFAIL.

The ideal solution would be if whence had an option to
put the result in REPLY instead of printing it to stdout.

The test being extended is highlighters/main/test-data/control-flow2.zsh.

Closes #291.

* commit '2f18ba':
  'main': use zsh/parameter to resolve alias
  driver: load zsh/parameter if available

If possible, use zsh/parameter to avoid forks.

Fixes #263.

* upstream/pr/308:
  'main': Fix issue #302, "Process substitution misparsed as redirection".
  'main': Factor out common code.  No functional change.
  'main': Add a regression test for issue #302, "Process substitution misparsed as redirection".

Follow-up to 2176692704.

Part of #306.

Found-by: m0viefreak
(in #298)

* upstream/pr/315:
  'main': optimization that in my tests shows 2.7s -> 2.2s

Consider indexing long buffers (say 300 chars). E.g. following line:
      integer offset=${${buf[start_pos+1,len]}[(i)$needle]}
will gradually go into large indices for first index [a,] and be kept
at large index for second index [,b]. Instead, we can remove already
processed characters from buf:
    proc_buf="${proc_buf[offset + $#arg + 1,-1]}"
$offset and $#arg are small, first index will not be large. $proc_buf
will be smaller and smaller and the second index [,-1] will run shorter
and shorter.

Keep references in prose as '~/.zshrc': using $ZDOTDIR in that context would
be confusing, and people who set $ZDOTDIR understand these references.