--- a/doc/book/en/tutorials/base/customizing-the-application.rst	Thu Jan 17 18:30:08 2013 +0100
+++ b/doc/book/en/tutorials/base/customizing-the-application.rst	Fri Jan 18 16:40:11 2013 +0100
@@ -493,7 +493,7 @@
   entering the migration python shell
   just type migration commands or arbitrary python code and type ENTER to execute it
   type "exit" or Ctrl-D to quit the shell and resume operation
-  >>> add_cubes('comment', 'tag')
+  >>> add_cubes(('comment', 'tag'))
   >>>
 
 Then restart the instance. Let's look at a blog entry: