[issue46469] asyncio Generic classes should return GenericAlias in __class_getitem__

[Kumar Aditya]

Change by Kumar Aditya <rahuladitya303 at gmail.com>:


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keywords: +patch
pull_requests: +28962
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30777

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<https://bugs.python.org/issue46469>
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