ruff-format fix

Author: DanielYang59

cmasher/tests/test_utils.py

@@ -152,9 +152,7 @@ def test_invalid_nodes_types(self):
     def test_cmaps_nodes_length_mismatch(self, cmaps, nodes):
         with pytest.raises(
             ValueError,
-            match=(
-                "Number of nodes should be one less than the number of colormaps."
-            ),
+            match=("Number of nodes should be one less than the number of colormaps."),
         ):
             combine_cmaps(*cmaps, nodes=nodes)