Fix typo in asyncio.AbstractServer documentation

Doc/library/asyncio-protocol.rst

@@ -515,7 +515,7 @@ Server
 
 .. class:: AbstractServer
 
-   Abstract server returned by create_service().
+   Abstract server returned by :func:`BaseEventLoop.create_server`.
 
    .. method:: close()
 

Lib/asyncio/events.py

@@ -99,7 +99,7 @@ class TimerHandle(Handle):
 
 
 class AbstractServer:
-    """Abstract server returned by create_service()."""
+    """Abstract server returned by create_server()."""
 
     def close(self):
         """Stop serving.  This leaves existing connections open."""