[issue28556] typing.py upgrades

[miss-islington]

miss-islington <mariatta.wijaya+miss-islington at gmail.com> added the comment:


New changeset 5fda09cc1ebcb364a660bc5a831ef8f6463d810b by Miss Islington (bot) in branch '3.8':
bpo-28556: Add a regression test to typing (GH-15396)
https://github.com/python/cpython/commit/5fda09cc1ebcb364a660bc5a831ef8f6463d810b


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<https://bugs.python.org/issue28556>
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