[issue37751] In codecs, function 'normalizestring' should convert both spaces and hyphens to underscores.

[STINNER Victor]

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

Thanks Inada-san for documenting the change in codecs.register() doc!

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37751>
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