Update the code to better reflect recommended style:

Use != instead of <> since <> is documented as "obsolescent".
Use "is" and "is not" when comparing with None or type objects.

Lib/test/test_socket.py

@@ -137,7 +137,7 @@ try:
             msg = 'socket test'
             s.send(msg)
             data = s.recv(1024)
-            if msg <> data:
+            if msg != data:
                 print 'parent/client mismatch'
             s.close()
         finally: