[issue18151] Idlelib: update to "with open ... except OSError" (in 2.7, leave IOError)

[Terry J. Reedy]

Terry J. Reedy added the comment:

Patch looked good, so I backported to 2.7 (attached, in case there are problems) and pushed.

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assignee:  -> terry.reedy
resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed
Added file: http://bugs.python.org/file31158/idle_with_open-27.patch

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