- Fix mentioned shortcut, to what the shortcut actually is, and that it accepts blocks for `assert_no_enqueued_jobs` and `assert_no_performed_jobs` test helpers.
- args => arguments when used in actual docs.

[ci skip]
- Changed description for AJ enqueuing methods to provide a sane description.

[ci skip]
Merge pull request #17338 from vipulnsward/aj-doc-fixes

AJ doc fixes [ci skip]