I'm delighted to announce the release of Sphinx 4.0.0 final, now available on
the Python package index at <https://pypi.org/project/Sphinx/
It includes many changes including incompatible ones.
Please confirm it working fine on your documents.
In detail, please see CHANGES:
Thanks to all collaborators and contributers!
What is it?
Sphinx is a tool that makes it easy to create intelligent and beautiful
documentation for Python projects (or other documents consisting of
multiple reStructuredText source files).