doc: fix some recent doc nits
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
- Fix formatting.
- Fix list numbering.
- Unify abbreviation casing.
- Use an uppercased constructor in a hypothetic code example.
- Fix typos.
- Fix sorting in sections and references.