[issue25776] More compact pickle of iterators etc

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


Added file: http://bugs.python.org/file44430/iterators_pickle_4.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25776>
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