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bpo-37751: Update codecs.register() doc. (GH-25643)

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(cherry picked from commit 5c84bb506a)

Co-authored-by: Inada Naoki <songofacandy@gmail.com>
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Miss Islington (bot) 2021-04-27 19:26:11 -07:00 • committed by GitHub
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Doc/library/codecs.rst
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@ -159,9 +159,13 @@ function:
.. function:: register(search_function)
Register a codec search function. Search functions are expected to take one
argument, being the encoding name in all lower case letters, and return a
:class:`CodecInfo` object. In case a search function cannot find
a given encoding, it should return ``None``.
argument, being the encoding name in all lower case letters with hyphens
and spaces converted to underscores, and return a :class:`CodecInfo` object.
In case a search function cannot find a given encoding, it should return
``None``.
.. versionchanged:: 3.9
Hyphens and spaces are converted to underscore.
.. note::