[docs] [issue28911] Clarify the behaviour of assert_called_once_with

[STINNER Victor]

STINNER Victor added the comment:


New changeset fa30453568ae71861aa1928373bd76da4f3a33f6 by Victor Stinner (Arne de Laat) in branch '3.5':
bpo-28911: Clarify the behaviour of assert_called_once_with. (#254)
https://github.com/python/cpython/commit/fa30453568ae71861aa1928373bd76da4f3a33f6


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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28911>
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