[issue39491] Import PEP 593 (Flexible function and variable annotations) support already implemented in typing_extensions

[Jakub Stasiak]

Change by Jakub Stasiak <jakub+python.org at stasiak.at>:


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pull_requests: +17766
pull_request: https://github.com/python/cpython/pull/18379

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<https://bugs.python.org/issue39491>
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