Addresses issue #621 (#1181)

* issue#621: html highlighter

* docs for issue#621

* removing windows support for issue#621

Co-authored-by: Tinmarino <tinmarino@gmail.com>

doc/vimwiki.txt

@@ -3572,6 +3572,40 @@ The header level of generated links. Valid values are from 1 to 6.
 The default is 1.
 
 
+------------------------------------------------------------------------------
+*g:vimwiki_listing_hl*
+
+When set to 1, enables syntax highlighting in resulting HTML. Whenever a code
+block is encountered the *g:vimwiki_listing_hl_command* is invoked on the
+code block.
+
+
+Value           Description~
+0               Do not highlight code blocks in HTML.
+1               Highlight code blocks in HTML. see *g:vimwiki_listing_hl_command*
+
+Default: 0
+
+
+------------------------------------------------------------------------------
+*g:vimwiki_listing_hl_command*
+
+A string specifying the command for highlighting code blocks in html. The
+argument is going to be a file with an extension specified by a
+type=extension. For example, a python listing would be written like s: >
+  {{{type=py
+  print("hello world")
+  }}}
+The argument in this case is going to be a `foo.py`. The result of the
+highlighting command is going to be enclosed in pre tags with the `type`
+attribute. >
+  <pre type=py>
+  %output of highlight command&
+  </pre>
+
+The default is 'pygmentize -f html'.
+
+
 ------------------------------------------------------------------------------
 *g:vimwiki_tags_header*
 
@@ -3924,6 +3958,7 @@ Contributors and their Github usernames in roughly chronological order:
     - Vinny Furia (@vinnyfuria)
     - paperbenni (@paperbenni)
     - Lily Foster (@lilyinstarlight)
+    - Youssof Taha (@ysftaha)
     - Thomas Leyh (@leyhline)
 
 ==============================================================================
@@ -3936,6 +3971,7 @@ http://code.google.com/p/vimwiki/issues/list. They may be accessible from
 https://github.com/vimwiki-backup/vimwiki/issues.
 
 New:~
+    * Issue #621: Feature request: Highlight code listings in HTML
     * Issue #290: Calendar plugin, do not sign if no wiki
     * Issue #281: Permit `\|` in tables
     * PR #1128: VimwikiGoto: Support wiki pages with spaces