[issue5329] os.popen2 and os.popen3 in python 2.6 incompatible with os.popen* in python 2.5

[Jani Hakala]

Changes by Jani Hakala <jahakala at iki.fi>:


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type:  -> behavior

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5329>
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