[issue39943] Meta: Clean up various issues in C internals

[Ammar Askar]

Change by Ammar Askar <ammar at ammaraskar.com>:


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pull_requests: +19754
pull_request: https://github.com/python/cpython/pull/20508

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39943>
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