[issue37752] Redundant Py_CHARMASK called in normalizestring(codecs.c)

[Jordon.X]

Change by Jordon.X <9651234 at qq.com>:


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pull_requests: +14842
pull_request: https://github.com/python/cpython/pull/15095

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37752>
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