entc/gen: check edge-field on mutation-cleared calls for edges

Fixed #1445

examples/o2obidi/ent/mutation.go

@@ -227,7 +227,7 @@ func (m *UserMutation) ClearSpouse() {
 	m.clearedspouse = true
 }
 
-// SpouseCleared returns if the "spouse" edge to the User entity was cleared.
+// SpouseCleared reports if the "spouse" edge to the User entity was cleared.
 func (m *UserMutation) SpouseCleared() bool {
 	return m.clearedspouse
 }