[issue22831] Use "with" to avoid possible fd leaks

[Serhiy Storchaka]

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

PR 10921 is based on fd_leaks_distutils.patch.

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versions: +Python 3.8 -Python 3.5

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<https://bugs.python.org/issue22831>
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