[issue25616] Extract OrderedDict tests into separate file

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Thank you Raymond. Here is a patch. It is in Git format, hence Rietveld will not work with it. During creating a patch I found a bug in test_dict_update, it tested only default implementation and didn't test subclasses.

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keywords: +patch
stage:  -> patch review
versions: +Python 2.7, Python 3.4, Python 3.5, Python 3.6
Added file: http://bugs.python.org/file41056/test_ordered_dict.patch

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