message: clean test_wasserstein from useless np.array
diff: @@ -61,15 +61,15 @@ def _basic_wasserstein(wasserstein_distance, delta, test_infinity=True, test_mat
  if test_matching:
  match = wasserstein_distance(emptydiag, emptydiag, matching=True, internal_p=1., order=2)[1]
  - assert np.array_equal(match, np.array([]))
  + assert np.array_equal(match, [])
  match = wasserstein_distance(emptydiag, emptydiag, matching=True, internal_p=np.inf, order=2.24)[1]
  - assert np.array_equal(match, np.array([]))
  + assert np.array_equal(match, [])
  match = wasserstein_distance(emptydiag, diag2, matching=True, internal_p=np.inf, order=2.)[1]
  - assert np.array_equal(match , np.array([[-1, 0], [-1, 1]]))
  + assert np.array_equal(match , [[-1, 0], [-1, 1]])
  match = wasserstein_distance(diag2, emptydiag, matching=True, internal_p=np.inf, order=2.24)[1]
  - assert np.array_equal(match , np.array([[0, -1], [1, -1]]))
  + assert np.array_equal(match , [[0, -1], [1, -1]])
  match = wasserstein_distance(diag1, diag2, matching=True, internal_p=2., order=2.)[1]
  - assert np.array_equal(match, np.array([[0, 0], [1, 1], [2, -1]]))
  + assert np.array_equal(match, [[0, 0], [1, 1], [2, -1]])
  