Hello @JScherer-WMF , I'm not so familiar with how phabricator works.
How do we access the mock up?

The remaining issues concerning the .alternance class are not caused by the class itself, but rather by inline colors applied to table cells in addition to the class.

I tried this. Is it the kind of fix that is expected, or did I not understand the recommendations ?

Hello,
"Alternance" refers to a class for tables that allows every other row to have a slightly different background color. This visual distinction helps to easily differentiate between the rows, similar to how every other comment has a different background color in the discussion pages of frwiki.

It is a duplicate of T350912. empty link= works as expected, the problem is that users did not want to add it.