merge conflict

Author: pbrubeck

firedrake/mg/embedded.py

@@ -97,7 +97,7 @@ def cache(self, V):
 
     def cache_key(self, V):
         _, level = get_level(V.mesh())
-        return (level, )
+        return (level,)
 
     def V_dof_weights(self, V):
         """Dof weights for averaging projection.