C/QotW + notable changes

[llogiq]

No description provided.

[llogiq]

No idea why the markdown check fails. Perhaps someone can help?

[ericseppanen]

No idea why the markdown check fails. Perhaps someone can help?

I will have a look.

[ericseppanen]

The error is because of this line:

* [implement `[OsStr]::join`](https://github.com/rust-lang/rust/pull/96881)

That should be valid markdown, except that Python-Markdown <= 3.3.6 doesn't parse it correctly, which results in an empty list-item in the output, instead of the link we asked for.

This was seen previously as #2781. Since it would silently show up broken on the site, I added a CI check for empty list-items in the output.

I see that Python-Markdown 3.3.7 has been released (which I think should have the fix), but until we get that integrated into the site deployment workflow, my workaround is to add a useless   to the offending line, i.e.

* [implement `[OsStr]::join`](https://github.com/rust-lang/rust/pull/96881)  

[nellshamrell]

Doing the workaround for now, but will take a look at upgrading (ty filing the issue!) later this week