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

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Only the most important patch for the stdlib was committed.

Patches for distutils, tests and tools are not committed still.

fd_leaks_distutils.patch
fd_leaks_tools1_2.patch
fd_leaks_tools2_2.patch
fd_leaks_tests1_2.patch
fd_leaks_tests2_2.patch

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Added file: http://bugs.python.org/file41480/fd_leaks_tests2_2.patch

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