Indent where clause in rustdoc

[dirk]

• Add around clause
• CSS rule to format the span

(for issue #20176)

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @alexcrichton (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. The way Github handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see CONTRIBUTING.md for more information.

[huonw]

Thanks!

Would it be possible to post a screenshot of an example (or a rendered copy of the whole docs)?

[dirk]

Yup! Will toss one up here in the morning.

[dirk]

@huonw Here you go!

[tomjakubowski]

Might look nicer to use ::before to insert some spaces rather than using padding with an em since we're using a monospace font. On modern browsers there's the ch unit too. Just a thought.

(I'm opposed to indenting where clauses in Rust code, instead keeping them on the next line but same column, but the community consensus seems to be tilting towards indenting them)

[dirk]

@tomjakubowski Oh I like the ::before CSS approach! Just pushed that.

[tomjakubowski]

Screenshot? :)

[dirk]

Yup, here you are.