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

[Matthias Klose]

Matthias Klose <doko at debian.org> added the comment:

please note that pinning usually is not a solution for Linux distributions.  Yes, the most wanted fix would be to fix sphinx 3.x not to break compatibility with 2.x.  Or limit 3.9 to 2.x features for now.

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nosy: +doko

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