[docs] [issue32284] typing.TextIO and BinaryIO are not aliases of IO[...]

[Sebastian Rittau]

Change by Sebastian Rittau <srittau at rittau.biz>:


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keywords: +patch
pull_requests: +4723
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32284>
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