EntityListBuilder::buildRow() return docs are wrong

That looks great, thanks!

The Needs Review Queue Bot → tested this issue.

While you are making the above changes, we recommend that you convert this patch to a merge request → . Merge requests are preferred over patches. Be sure to hide the old patch files as well. (Converting an issue to a merge request without other contributions to the issue will not receive credit.)

Binoli Lalani → made their first commit to this issue’s fork.

Hello,

I rebased the branch to check the testcases actual errors. Now testcases are passed with the latest code merge. Please review the MR.

Thank you!

Previously was RTBC before bot. Conversion to MR seems fine.

but actually, it's not necessarily a render array. The result is put into the table render element's #rows property, and that can take a row array where each cell is a string, or an array with a 'data' key.

So this is still an array - either a render array or an array of strings... so changing this to mixed is misleading at the comment change is also wrong as we're not returning a string here.

> This can either be a string representing a cell

This is wrong too.