#19970: fix additional typo in 3.4 asyncio docs.

Doc/library/asyncio-protocol.rst

@@ -649,7 +649,7 @@ TCP echo server example, send back received data and close the connection::
         server.close()
         loop.close()
 
-:meth:`Transport.close` can be called immediatly after
+:meth:`Transport.close` can be called immediately after
 :meth:`WriteTransport.write` even if data are not sent yet on the socket: both
 methods are asynchronous. ``yield from`` is not needed because these transport
 methods don't return coroutines.