[MERGE] fix bzr log --short and add a test

[Ian Clatworthy]

Ian Clatworthy has voted comment.
Status is now: Semi-approved
Comment:
The core fix has been applied to bzr.dev. I'll review the test soon. As 
explained in email, I believe that linear_view_revisions() needs to 
stay.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C49710CB8.4010904%40arbash-meinel.com%3E
Project: Bazaar