[issue35379] IDLE's close fails io is set to None on Mac

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Before closing this, I want to review #17822 and if the specific fix is superceded by this one, remove it.

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stage: patch review -> commit review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35379>
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