Syntax highlighting (based on CodeMirror) is a beta feature on all
left-to-right wikis:
https://meta.wikimedia.org/wiki/Community_Tech/Wikitext_editor_syntax_highlighting

(It'll come to right-to-left wikis as soon as the RTL problems have been fixed.)

There's not going to a big MassMessage to all the wikis about this,
but if you think it'll be helpful, please spread the word in your
community, on your local Village Pump etc.

//Johan Jönsson
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