[issue45680] Documentation on `GenericAlias` objects could be improved

[Alex Waygood]

Change by Alex Waygood <Alex.Waygood at Gmail.com>:


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keywords: +patch
pull_requests: +27603
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/29335

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45680>
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