[issue28556] typing.py upgrades

[Roundup Robot]

Roundup Robot added the comment:

New changeset 75c7bc2c1ad8 by Guido van Rossum in branch '3.5':
Issue #28556: upstream improvements to docstrings and error messages by Ivan Levkivskyi (#331)
https://hg.python.org/cpython/rev/75c7bc2c1ad8

New changeset 294525aac5eb by Guido van Rossum in branch '3.6':
Issue #28556: upstream improvements to docstrings and error messages by Ivan Levkivskyi (#331) (3.5->3.6)
https://hg.python.org/cpython/rev/294525aac5eb

New changeset 30f154d9abf0 by Guido van Rossum in branch 'default':
Issue #28556: upstream improvements to docstrings and error messages by Ivan Levkivskyi (#331) (3.6->3.7)
https://hg.python.org/cpython/rev/30f154d9abf0

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