[issue37828] Fix default mock_name in unittest.mock.assert_called error message

[Abraham]

Change by Abraham <categulario at gmail.com>:


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keywords: +patch
pull_requests: +15775
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/16166

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37828>
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