[issue11874] argparse assertion failure with brackets in metavars

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


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nosy: +bethard, eric.araujo
versions: +Python 3.2, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11874>
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