[docs] [issue35848] readinto is not a method on io.TextIOBase

[SilentGhost]

Change by SilentGhost <ghost.adh at runbox.com>:


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assignee:  -> docs at python
components: +Documentation -IO
nosy: +docs at python
stage:  -> needs patch
versions: +Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35848>
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