Steps to replicate the issue (include links if applicable):
- Set up a MediaWiki instance with Minerva installed and wikidiff2 not installed. (This sets the diff engine to php.)
- Compare changes using Special:MobileDiff.
What happens?:
The 2-column view breaks. Each column takes up 100% of screen width.
What should have happened instead?:
Each column should take up 50% of screen width, just as Special:Diff.
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):
https://mh.wdf.ink/wiki/Special:MobileDiff/1460
The styles that cause this issue were added in T171726, which fixes table overflow issues when diff engine is wikidiff2. However, they accidentally affect the layout when the diff engine is php.