bos@144: $ \textbf{echo third change >> myfile}
bos@144: $ \textbf{hg commit -m 'third change'}
bos@144: $ \textbf{hg backout -m 'back out second change' 1}
bos@144: reverting myfile
hg@296: created new head
bos@144: changeset  backs out changeset 
bos@144: the backout changeset is a new head - do not forget to merge
bos@144: (use "backout --merge" if you want to auto-merge)