[issue5541] File's current position inconsistent with 'a+' mode

[Antoine Pitrou]

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


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priority:  -> normal
type:  -> behavior
versions: +Python 2.7 -Python 2.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5541>
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