CLN: Specialize assert_(np.array_equal(...))
Work on #6175. Work in progress. One more commit needed to finish; splitting to keep reasonably sized.
- Changes assert_numpy_array_equals to assert_numpy_array_equal, for consistency with other methods. (API change of recently-added function)
- Changes instances of assert_(np.array_equal(A,B)) to assert_numpy_array_equal(A,B)
- Update release.rst to reflect work on #6175
