[issue12291] file written using marshal in 3.2 can be read by 2.7, but not 3.2 or 3.3

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at haypocalc.com>:


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nosy: +haypo

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12291>
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