Slight wording change suggested by Steve Dower.

pep-3156.txt

@@ -154,7 +154,7 @@ A conforming event loop object has the following methods:
 
 - ``run()``.  Runs the event loop until there is nothing left to do.
   This means, in particular:
-  
+
   - No more calls scheduled with ``call_later()`` (except for canceled
     calls).
 
@@ -720,8 +720,8 @@ into a Task, callbacks can be added to the Task.
 You may ask, why not convert all coroutines to Tasks?  The
 ``@tulip.coroutine`` decorator could do this.  This would slow things
 down considerably in the case where one coroutine calls another (and
-so on), as waiting for a "bare" coroutine has much less overhead than
-waiting for a Future.
+so on), as switching to a "bare" coroutine has much less overhead than
+switching to a Task.
 
 The Scheduler
 -------------