[issue18920] argparse version action should print to stdout, not stderr

[Jakub Wilk]

Changes by Jakub Wilk <jwilk at jwilk.net>:


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nosy: +jwilk
title: argparse module version action -> argparse version action should print to stdout, not stderr

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18920>
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