[issue25014] Add contextlib.itercm()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

What if the last line will be never read? We had bugs with resource leaks in generators, and I'm not sure that all such bugs were fixed.

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nosy: +pitrou, serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25014>
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