[issue4740] pickle test for protocol 3 (HIGHEST_PROTOCOL in py3k)

[Hirokazu Yamamoto]

Changes by Hirokazu Yamamoto <ocean-city at m2.ccsnet.ne.jp>:


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stage: patch review -> committed/rejected

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4740>
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