Accept output

tests/deriving/should_fail/T3621.stderr

@@ -1,13 +1,9 @@
 
 T3621.hs:21:21:
-    Couldn't match type `s' with `state'
-      `s' is an unknown type variable
-      `state' is an unknown type variable
-    When using functional dependencies to combine
-      MonadState s (State s),
-        arising from the dependency `m -> s'
-        in the instance declaration at T3621.hs:18:10
-      MonadState state (State s),
-        arising from the 'deriving' clause of a data type declaration
-        at T3621.hs:21:21-36
+    No instance for (MonadState state (State s))
+      arising from the 'deriving' clause of a data type declaration
+    Possible fix:
+      add an instance declaration for (MonadState state (State s))
+      or use a standalone 'deriving instance' declaration,
+           so you can specify the instance context yourself
     When deriving the instance for (MonadState state (WrappedState s))