Also:
- Remove unnecessary space from `figure` tag if no class is specified.
- Update related tests.
- Add test cases for the changes made to the figure shortcode.
- Document the newly added target and rel parameters
- Add more detail to the documentation of all figure shortcode parameters.
According to @bep, it is easier to undraft content by
editing manually the frontmatter of said content by
setting the draft flag to `false`, or removing it completely,
than to rely on the undraft command which is a source of
many bugs.
Fixes #4353