fix missing quote

Doc/library/multiprocessing.rst

@@ -1162,7 +1162,7 @@ their parent process exits.  The manager classes are defined in the
       Connect a local manager object to a remote manager process:
 
       >>> from multiprocessing.managers import BaseManager
-      >>> m = BaseManager(address='127.0.0.1', authkey='abc)
+      >>> m = BaseManager(address='127.0.0.1', authkey='abc')
       >>> m.connect()
 
    .. method:: shutdown()