[issue21582] use support.catpured context managers - test_asyncore

[diana]

Changes by diana <diana.joan.clarke at gmail.com>:


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title: use the support.catpured_stdout/stderr context managers - test_asyncore -> use support.catpured context managers - test_asyncore

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21582>
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