Steps to replicate the issue (include links if applicable):

• logged-in with your skin Vector 2022 selected, open p.e. this diff page

What happens?:

• the max width is not respected, a large horizontal scroll is needed

What should have happened instead?:

• the two-columns of the diff should be shown in the max-width of the screen without scrolling, as usual

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):
wide screen, PC, Firefox 103.0.1 (64 bits) - I can't reproduce the bug with Chrome version 103.0.5060.134 (Build officiel) (64 bits) or Opera version 89.0.4447.71
the user of the original message says he has the same problem also with Edge and Chrome.