Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/sockets/rpython.py b/Demo/sockets/rpython.py
index 8333d39..b654dc2 100755
--- a/Demo/sockets/rpython.py
+++ b/Demo/sockets/rpython.py
@@ -12,7 +12,7 @@
 
 def main():
     if len(sys.argv) < 3:
-        print "usage: rpython host command"
+        print("usage: rpython host command")
         sys.exit(2)
     host = sys.argv[1]
     port = PORT
@@ -30,6 +30,6 @@
         data = s.recv(BUFSIZE)
         if not data: break
         reply = reply + data
-    print reply,
+    print(reply, end=' ')
 
 main()