[issue10654] test_datetime sometimes fails on Python3.x windows binary

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Both subclasses return NotImplemented for d+1. Otherwise, TypeError or NotImplemented as expected. See file.

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Added file: http://bugs.python.org/file26519/datetimetest.py

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