[issue5986] Avoid reversed() in Random.shuffle()

[Antoine Pitrou]

Changes by Antoine Pitrou <pitrou at free.fr>:


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priority:  -> normal
stage:  -> patch review
type:  -> performance
versions: +Python 2.7, Python 3.1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5986>
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