Mkdocs-macros-plugin

* Added: complete test framework, using pytest and Mkdocs-Test (244)
A number of automated test cases are implemented.
* Changed: move from setup.py to pyproject.toml (250)

* Added: three hooks `register_variables/macros/filters` to facilitate
cooperation with other MkDocs plugins.
* Fixed: `define_env() was always required in module (191)
* Added: trace the case when no module is found (INFO)
* Improved documentation, particularly about HTML pages
* Added: parameters `j2_comment_start_string` and
`j2_comment_end_string` to plugin's parameters,
to specify alternate markers for comments.
* Added the multiline parameter `force_render_paths` in the config file,
to specify directories or file patterns to be rendered for the case when `render_by_default = false`
(the `render_macros` parameter in the YAML header of the page
has the last word).

* Added: git.short_tag (183)
* Added: Mermaid diagrams in the documentation (Readthedocs)
* Fixed: Changelog was no longer displayed (186)

* Fixed: Warning due to filter issue with mkdocs >= 1.5
* Fixed: Debug html tables (including for `macro_info()`) are
now readable also in dark mode.

* Added: it is now possible to use macros in page titles, in the
nav section of the yaml file, or in the level 1 titles;
the macros are correctly interpreted in the navigation part
of the page.