[issue40027] re.sub inconsistency beginning with 3.7

[Matthew Barnett]

Matthew Barnett <python at mrabarnett.plus.com> added the comment:

Duplicate of Issue39687.

See https://docs.python.org/3/library/re.html#re.sub and https://docs.python.org/3/whatsnew/3.7.html#changes-in-the-python-api.

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resolution:  -> duplicate
stage:  -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40027>
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