[docs] [issue24692] types.coroutines() idempotence documentation

[Roundup Robot]

Roundup Robot added the comment:

New changeset 636ce05ea8f6 by Yury Selivanov in branch '3.5':
Issue #24692: Add more tests for types.coroutine
https://hg.python.org/cpython/rev/636ce05ea8f6

New changeset 3f3e398bcd3e by Yury Selivanov in branch 'default':
Merge 3.5 (Issue #24692)
https://hg.python.org/cpython/rev/3f3e398bcd3e

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nosy: +python-dev

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<http://bugs.python.org/issue24692>
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