pep-0492: Edits re PEP 3152.

pep-0492.txt

@@ -692,8 +692,10 @@ Differences from this proposal:
    executes ``yield from`` on it.  Although, ``__await__`` method is similar to
    ``__cocall__``, but is only used to define *Future-like* objects.
 
-2. ``await`` is defined in the same way as ``yield`` in the grammar (it is
-   later enforced that ``await`` can only be inside ``async def``).
+2. ``await`` is defined in almost the same way as ``yield from`` in the grammar
+   (it is later enforced that ``await`` can only be inside ``async def``).  It
+   is possible to simply write ``await future``, whereas ``cocall`` always
+   requires parentheses.
 
 3. To make asyncio work with PEP 3152 it would be required to modify
    ``@asyncio.coroutine`` decorator to wrap all functions in an object with a