[issue21582] use support.captured_stdx context managers - test_asyncore

[Roundup Robot]

Roundup Robot added the comment:

New changeset c2dba8ee4e96 by Victor Stinner in branch '3.4':
Closes #21582: Cleanup test_asyncore. Patch written by diana.
http://hg.python.org/cpython/rev/c2dba8ee4e96

New changeset f1cd0aa1561a by Victor Stinner in branch 'default':
(Merge 3.4) Closes #21582: Cleanup test_asyncore. Patch written by diana.
http://hg.python.org/cpython/rev/f1cd0aa1561a

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nosy: +python-dev
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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<http://bugs.python.org/issue21582>
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