Add unit test and (GH#61941)

Author: Aniketsy

pandas/tests/util/test_assert_index_equal.py

@@ -322,5 +322,7 @@ def test_assert_index_equal_categorical_mismatch_categories():
     # GH#61941
     ci1 = CategoricalIndex(["a", "b", "c"], categories=["a", "b", "c"], ordered=False)
     ci2 = CategoricalIndex(["a", "x", "c"], categories=["a", "b", "c"], ordered=False)
+    
     with pytest.raises(AssertionError, match="Index are different"):
         tm.assert_index_equal(ci1, ci2, check_exact=False, check_categorical=True)
+