Fix syntax

Author: twiecki

tests/test_config.py

@@ -255,9 +255,9 @@ def test_config_pickling():
         in_c_key=False,
     )
     with pytest.raises(
-            AttributeError, 
-            match="Can't get local object 'test_config_pickling.<locals>.<lambda>'",
-        ):
+        AttributeError, 
+        match="Can't get local object 'test_config_pickling.<locals>.<lambda>'",
+    ):
         pickle.dump(root, io.BytesIO())