[issue9495] argparse unittest tracebacks are confusing if an error is raised when not expected

[Ezio Melotti]

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


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keywords:  -easy
nosy: +ezio.melotti
stage: needs patch -> patch review
versions: +Python 3.3, Python 3.4 -Python 3.1, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9495>
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