[issue40204] Docs build error with Sphinx 3.0 due to invalid C declaration

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


----------
keywords: +patch
nosy: +python-dev
nosy_count: 8.0 -> 9.0
pull_requests: +18759
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19397

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40204>
_______________________________________