Use assert_allclose from numpy.testing instead of np.allclose in matrix comparison tests

[mscheltienne]

assert_allclose has a saner atol=0 and a more informative message on failure than np.allclose.

Change Type

• [ ] bugfix (+0.0.1)
• [ ] minor (+0.1.0)
• [ ] major (+1.0.0)
• [ ] refactoring (no version update)
• [x] test (no version update)
• [ ] infrastructure (no version update)
• [ ] documentation (no version update)
• [ ] other

[codecov[bot]]

Codecov Report

Merging #69 (aef8391) into master (8e4fbae) will not change coverage. Report is 1 commits behind head on master. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #69   +/-   ##
=======================================
  Coverage   90.93%   90.93%           
=======================================
  Files          14       14           
  Lines        1235     1235           
=======================================
  Hits         1123     1123           
  Misses        112      112           

[smoia]

LGTM!