[issue31966] [EASY C][Windows] print('hello\n', end='', flush=True) raises OSError when ran with py -u

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


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pull_requests: +5627

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31966>
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