$ \textbf{hg branch}
bar
$ \textbf{hg merge}
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ \textbf{hg commit -m 'Merge'}
$ \textbf{hg tip}
changeset:   
branch:      bar
tag:         tip
parent:      
parent:      
user:        Bryan O'Sullivan <bos@serpentine.com>

summary:     Merge