bos@144: $ \textbf{hg rollback}
bos@144: rolling back last transaction
bos@144: $ \textbf{hg tip}
bos@144: changeset:   
bos@144: tag:         tip
bos@144: user:        Bryan O'Sullivan <bos@serpentine.com>
bos@144: 
bos@144: summary:     First commit
bos@144: 
bos@144: $ \textbf{hg status}
bos@144: M a
bos@144: ? b