Unable to build docs; Sphinx complains about `intersphinx_mapping`#358

I get the following error when running `make -C docs text` ``` make: Entering directory '/build/python-sqlalchemy-continuum/src/sqlalchemy_continuum-1.4.2/docs' sphinx-build -b text -d _build/doctrees . _build/text Running Sphinx v8.0.2 loading translations [en]... done making output directory... done WARNING: html_static_path entry '_static' does not exist Converting `source_suffix = '.rst'` to `source_suffix = {'.rst': 'restructuredtext'}`. ERROR: Invalid value `None` in intersphinx_mapping['http://docs.python.org/']. Expected a two-element tuple or list. Configuration error: Invalid `intersphinx_mapping` configuration (1 error). make: *** [Makefile:126: text] Error 2 ``` I can build the docs using Sphinx 7 but it still warns about this: ``` WARNING: The pre-Sphinx 1.0 'intersphinx_mapping' format is deprecated and will be removed in Sphinx 8. Update to the current format as described in the documentation. Hint: `intersphinx_mapping = {'<name>': ('http://docs.python.org/', None)}`. https://www.sphinx-doc.org/en/master/usage/extensions/intersphinx.html#confval-intersphinx_mapping ```