chore/docs: fix rst style and typo

[imba-tjd]

Current:

After this change:

Trivial so I don't think it needs news or issue

Automerge-Triggered-By: GH:JulienPalard

[JulienPalard]

You can use:

``a``\ s

to keep the plural while keeping the rst syntax valid. "backslash-space" is "nothing" in rst, it just helps the parser.

Do you want to try it?

[imba-tjd]

Thanks! I have made the change

[JulienPalard]

Thanks for your pull request!

You should be able to see your modification appear on docs.python.org in less than 24h.

[miss-islington]

@imba-tjd: Status check is done, and it's a success ✅ .