Update output (comments added to source file)

testsuite/tests/ghc-regress/typecheck/should_compile/FD1.stderr

-
-FD1.hs:12:0:
-    Couldn't match expected type `a' against inferred type `Int -> Int'
-      `a' is a rigid type variable bound by
-	  the type signature for `plus' at FD1.hs:11:11
-    The equation(s) for `plus' have two arguments,
-    which does not match its type
+
+FD1.hs:16:0:
+    Couldn't match expected type `a' against inferred type `Int -> Int'
+      `a' is a rigid type variable bound by
+	  the type signature for `plus' at FD1.hs:15:11
+    The equation(s) for `plus' have two arguments,
+    which does not match its type