* we should use either `pytest.mark.mpl_image_compare` or `matplotlib.testing.decorators.image_comparison` for image comparison * we are using: * [`pytest.mark.mpl_image_compare`](https://github.com/pysal/mapclassify/blob/741ca5d3aa7264e227bf153b499b0909256df0f2/mapclassify/tests/test_mapclassify.py#L746) in `test_mapclassify.py` * [`matplotlib.testing.decorators.image_comparison`](https://github.com/pysal/mapclassify/blob/741ca5d3aa7264e227bf153b499b0909256df0f2/mapclassify/tests/test_legendgram.py#L76) in `test_legendgram.py` * ~~Since [`pytest-mpl`](https://github.com/matplotlib/pytest-mpl) is part of the Matplotlib org and wraps the `matplotlib.testing.decorators.image_comparison` functionality, let's just go that route~~ * switching direction and going with `matplotlib.testing.decorators.image_comparison` * see statement below