As of 2024-02-25, Tiki is using CodeMirror Version 5.19.0 which was released in 2016:
- https://gitlab.com/tikiwiki/tiki/-/blob/master/vendor_bundled/composer.json
- https://codemirror.net/5/doc/releases.html
There are multiple issues with the implementation.
On all sites I control, I hard-coded it to off:
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preference.feature_syntax_highlighter = "n"