@Avicennasis suggested here and there to update the message for global css and js files. I feel that the suggested changes are good that maybe the message itself could be modified. It's also good first task. Best regards.
- Mentioned In
- rMEXT7d98d40168c7: Updated mediawiki/extensions Project: mediawiki/extensions/GlobalCssJs…
rEGCJ5419c57ef7ac: Link to help documentation on global CSS/JS page edit notice
T72588: GlobalCssJs wording in preferences is unclear
rEGCJ8d1df5c5b9ba: Link to docs in MediaWiki:Globalcssjs-warning-js and MediaWiki:Globalcssjs…
rMEXTf62f6a7cb595: Updated mediawiki/extensions Project: mediawiki/extensions/GlobalCssJs…
- Mentioned Here
- T108516: Add page indicator with help link to [[Special:MyPage/global.js]]
You could also try to submit a patch to Gerrit yourself. :-) See https://www.mediawiki.org/wiki/Gerrit/Getting_started and https://www.mediawiki.org/wiki/Gerrit/Tutorial
It might be difficult at first but will be easy once you learn the basics. If you get stuck somewhere, you can always drop by #wikimedia-dev or MediaWiki-General and ask for help there.