Docutils is a modular system for processing documentation into useful formats, such as HTML, XML, and LaTeX. For input Docutils supports reStructuredText, an easy-to-read, what-you-see-is-what-you-get ...
The html doc is not building with the new docutils >= 0.22. It's not a problem yet, because the current Sphinx used (sphinx~=8.2.0) doesn't install the latest one, but it's something that should be ...