test_opt message fix

theano/compile/tests/test_function_module.py

@@ -40,8 +40,7 @@ class T_function(unittest.TestCase):
         fn = function([], None)  # ok
         rval = fn()
         if rval == []:
-            raise SkipTest("Not yet implemented")
-            # See #254: Using None as function output leads to [] return value
+            raise SkipTest("See #254: Using None as function output leads to [] return value")
         else:
             assert rval is None