[issue13601] sys.stderr should be line-buffered when stderr is not a TTY

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

See also issue28647 and issue30404.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13601>
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