adding foo adding bar adding baz 1 files updated, 0 files merged, 0 files removed, 0 files unresolved created new head 0 files updated, 0 files merged, 1 files removed, 0 files unresolved created new head % fail with three heads 0 files updated, 0 files merged, 0 files removed, 0 files unresolved abort: branch 'default' has 3 heads - please merge with an explicit rev (run 'hg heads .' to see heads) % close one of the heads 1 files updated, 0 files merged, 1 files removed, 0 files unresolved % succeed with two open heads 1 files updated, 0 files merged, 1 files removed, 0 files unresolved 0 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit)