[issue41305] Add StreamReader.readinto()

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan <tir.karthi at gmail.com>:


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components: +asyncio
nosy: +asvetlov, yselivanov
type:  -> enhancement
versions: +Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41305>
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