Fix line length issue in test_numpy_compat.py

Author: pelagiavlas

pandas/tests/indexes/test_numpy_compat.py

@@ -159,7 +159,10 @@ def test_numpy_ufuncs_reductions(index, func, request):
     if any(isinstance(x, str) for x in index) and \
             any(isinstance(x, int) for x in index):
         request.applymarker(
-            pytest.mark.xfail(reason="Cannot compare mixed types (int and str) in ufunc reductions")
+            pytest.mark.xfail(
+                reason="Cannot compare mixed types (int and str) in ufunc reductions" \
+                       " and should raise a TypeError"
+            )
         )
 
     if isinstance(index, CategoricalIndex) and index.dtype.ordered is False: