[issue23872] Typo in response in smtpd

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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stage:  -> commit review
versions: +Python 2.7, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23872>
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