Steps to Reproduce:
- Go to any page on a group0 wiki, e.g. https://www.mediawiki.org/wiki/MediaWiki (legacy, new Vector).
- Look at the action tabs in the upper right corner.
Actual Results:
- Next to Read, View source and View history there’s a tab called Watch.
Expected Results:
- The last tab shows a star icon.
Further Details:
- This affects only group0 wikis, not group1 or group2, so it arrived with wmf37 (T254174). Not sure if it’s a train blocker.
- Both legacy and new Vector are affected.