[issue37267] os.dup() creates an inheritable fd when handling a character file on Windows

[Zackery Spytz]

Change by Zackery Spytz <zspytz at gmail.com>:


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keywords: +patch
pull_requests: +13913
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/14051

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37267>
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