[issue7839] Popen should raise ValueError if pass a string when shell=False or a list when shell=True

[Éric Araujo]

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


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nosy: +eric.araujo
versions: +Python 3.3 -Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7839>
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