This adds a `lint.py` script to run sphinx-lint on Django's docs files,
a mathing `lint` target in the `docs/Makefile` and `docs/make.bat`, and
updates `docs/requirements.txt` accordingly.
This adds:
- GitHub actions,
- tox configuration,
- pre-commit hook, and
- makefile rules
to run blacken-docs linter.
Co-authored-by: David Smith <smithdc@gmail.com>
This pins Sphinx version, because the default Sphinx version used by
RTD is not compatible with Python 3.8+.
This also, sets Python 3.8 for RTD builds which is compatible with all
current versions of Django.
Thanks to Mariusz Felisiak for the suggestion.
