[issue20578] BufferedIOBase.readinto1 is missing

[Roundup Robot]

Roundup Robot added the comment:

New changeset b1e99b4ec374 by Benjamin Peterson in branch 'default':
backout 0fb7789b5eeb for test breakage (#20578)
http://hg.python.org/cpython/rev/b1e99b4ec374

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20578>
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