[issue30404] Make stdout and stderr truly unbuffered when using -u option

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

If there is a need in making redirected stdout line-buffered, a new option can be added in separate issue.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue30404>
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