[pre-commit.ci] auto fixes from pre-commit.com hooks

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xarray/tests/test_concat.py

@@ -659,7 +659,7 @@ def test_concat_errors(self):
 
         with pytest.raises(ValueError, match=r"compat.* invalid"):
             concat(split_data, "dim1", compat="foobar")
-        
+
         with pytest.raises(ValueError, match=r"compat.* invalid"):
             concat(split_data, "dim1", compat="minimal")