[issue28029] Replace and empty strings

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

Because of possible compatibility issue (very unlikely) this change is done only in master and will not be backported.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.9 -Python 2.7, Python 3.5, Python 3.6, Python 3.7

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<https://bugs.python.org/issue28029>
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