[issue40422] Light refactor: create a common _Py_closerange API

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Thanks Kyle Evans!

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.10 -Python 3.9

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<https://bugs.python.org/issue40422>
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