[docs] [issue11260] smtpd-as-a-script feature should be documented and should use argparse

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


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nosy: +berker.peksag
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11260>
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