[issue38352] In typing docs, note explicit import needed for IO and Pattern/Match

[Łukasz Langa]

Łukasz Langa <lukasz at langa.pl> added the comment:


New changeset 00726e51ade10c7e3535811eb700418725244230 by Miss Islington (bot) in branch '3.9':
bpo-38352: Add to typing.__all__ (GH-25821) (#25885)
https://github.com/python/cpython/commit/00726e51ade10c7e3535811eb700418725244230


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