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.
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 92b9336..fe37936 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -137,7 +137,7 @@
             msg = 'socket test'
             s.send(msg)
             data = s.recv(1024)
-            if msg <> data:
+            if msg != data:
                 print 'parent/client mismatch'
             s.close()
         finally: