Rollup merge of #88742 - GuillaumeGomez:fix-table-in-docblocks, r=nbdd0121
Fix table in docblocks
"Overwrite" of #88702.
Instead of adding a z-index to the sidebar (which only hides the issue, doesn't fix it), I wrap `<table>` elements inside a `<div>` and limit all chidren of `.docblock` elements' width to prevent having the scrollbar on the whole doc block.
![Screenshot from 2021-09-08 15-11-24](https://user-images.githubusercontent.com/
3050060/
132515740-
71796515-e74f-429f-ba98-
2596bdbf781c.png)
Thanks `@nbdd0121` for `overflow-x: auto;`. ;)
r? `@notriddle`