Current documentation: https://www.mediawiki.org/wiki/Extension:CodeMirror
Please update with the following goals in mind:
* Explain how to integrate MediaWiki extensions with CodeMirror (See examples at https://gerrit.wikimedia.org/r/#/c/348673/ and https://gerrit.wikimedia.org/r/#/c/350840/.
* Add updated screenshots. (You can use http://commtech.wmflabs.org/wiki/Sample_page and http://commtech.wmflabs.org/wiki/Test for example content.)
* Explain that the styles can be overridden and link to Beta_Features/Syntax_highlighting.
Let's put the documentation for end-users (editors) at https://www.mediawiki.org/wiki/Beta_Features/Syntax_highlighting. That should include:
* Provide a color coding key explaining what the available highlights are, and how they're colored.
* Explain how a user can override the CodeMirror styles with their own styles (via their user common.css page).
* Some screenshots