Fix to schedule() pseudo-code by Yuval Greenfield.

pep-0342.txt

@@ -486,8 +486,9 @@ Examples
             def stop(self):
                 self.running = False
 
-            def schedule(self, coroutine, stack=(), value=None, *exc):
+            def schedule(self, coroutine, stack=(), val=None, *exc):
                 def resume():
+                    value = val
                     try:
                         if exc:
                             value = coroutine.throw(value,*exc)