$ addcommit () {

  >     echo $1 > $1

  >     hg add $1

  >     hg commit -d "${2} 0" -m $1

  > }

  $ commit () {

  >     hg commit -d "${2} 0" -m $1

  > }

  $ hg init a

  $ cd a

  $ addcommit "A" 0

  $ addcommit "B" 1

  $ echo "C" >> A

  $ commit "C" 2

  $ hg update -C 0

  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo "D" >> A

  $ commit "D" 3

  created new head

Merging a conflict araises

  $ hg merge

  merging A

  warning: conflicts during merge.

  merging A incomplete! (edit conflicts, then use 'hg resolve --mark')

  1 files updated, 0 files merged, 0 files removed, 1 files unresolved

  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon

  [1]

Correct the conflict without marking the file as resolved

  $ echo "ABCD" > A

  $ hg commit -m "Merged"

  abort: unresolved merge conflicts (see hg help resolve)

  [255]

Mark the conflict as resolved and commit

  $ hg resolve -m A

  $ hg commit -m "Merged"

  $ cd ..