[issue22780] NotImplemented doc section needs update

[Roundup Robot]

Roundup Robot added the comment:

New changeset 26d0a17affb5 by Ethan Furman in branch 'default':
issue22780: update NotImplemented description
https://hg.python.org/cpython/rev/26d0a17affb5

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22780>
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