New matplotlib error message format breaks our tests #776
Description
First seen in #775:
python-control/control/tests/kwargs_test.py
Lines 144 to 146 in f909c82
> with pytest.raises(AttributeError, match="has no property"):
E AssertionError: Regex pattern 'has no property' does not match "Line2D.set() got an unexpected keyword argument 'unknown'".
control/tests/kwargs_test.py:145: AssertionError