Typo train

Context

This is the typo train, an instance of meta-issue #2329. See the latter for explanations and instructions, and then contribute here your minor changes to the documentation.

Manually testing the MR

Check that the commits are minor and non-controversial, and that they improve the doc.

Checklist

• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR