[MERGE] compare types with "is" not ==

[Ian Clatworthy]

Ian Clatworthy has voted approve.
Status is now: Approved


For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1afaf6160903071253x556a90bcxab084f3a424e8e8%40mail.gmail.com%3E
Project: Bazaar