initial

  $ hg init test-a

  $ cd test-a

  $ cat >test.txt <<"EOF"

  > 1

  > 2

  > 3

  > EOF

  $ hg add test.txt

  $ hg commit -m "Initial"

clone

  $ cd ..

  $ hg clone test-a test-b

  updating to branch default

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

change test-a

  $ cd test-a

  $ cat >test.txt <<"EOF"

  > one

  > two

  > three

  > EOF

  $ hg commit -m "Numbers as words"

change test-b

  $ cd ../test-b

  $ cat >test.txt <<"EOF"

  > 1

  > 2.5

  > 3

  > EOF

  $ hg commit -m "2 -> 2.5"

now pull and merge from test-a

  $ hg pull ../test-a

  pulling from ../test-a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files (+1 heads)

  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ hg merge

  merging test.txt

  warning: conflicts while merging test.txt! (edit, then use 'hg resolve --mark')

  0 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]

resolve conflict

  $ cat >test.txt <<"EOF"

  > one

  > two-point-five

  > three

  > EOF

  $ rm -f *.orig

  $ hg resolve -m test.txt

  (no more unresolved files)

  $ hg commit -m "Merge 1"

change test-a again

  $ cd ../test-a

  $ cat >test.txt <<"EOF"

  > one

  > two-point-one

  > three

  > EOF

  $ hg commit -m "two -> two-point-one"

pull and merge from test-a again

  $ cd ../test-b

  $ hg pull ../test-a

  pulling from ../test-a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files (+1 heads)

  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ hg merge --debug

    searching for copies back to rev 1

  resolving manifests

   branchmerge: True, force: False, partial: False

   ancestor: 96b70246a118, local: 50c3a7e29886+, remote: 40d11a4173a8

   preserving test.txt for resolve of test.txt

  picked tool ':merge' for test.txt (binary False symlink False)

  merging test.txt

  my test.txt@50c3a7e29886+ other test.txt@40d11a4173a8 ancestor test.txt@96b70246a118

  picked tool ':merge' for test.txt (binary False symlink False)

  my test.txt@50c3a7e29886+ other test.txt@40d11a4173a8 ancestor test.txt@96b70246a118

  warning: conflicts while merging test.txt! (edit, then use 'hg resolve --mark')

  0 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]

  $ cat test.txt

  one

  <<<<<<< local: 50c3a7e29886  - test: Merge 1

  two-point-five

  =======

  two-point-one

  >>>>>>> other: 40d11a4173a8 - test: two -> two-point-one

  three

  $ hg debugindex test.txt

     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)

       0         0       7  .....       0 01365c4cca56 000000000000 000000000000 (re)

       1         7       9  .....       1 7b013192566a 01365c4cca56 000000000000 (re)

       2        16      15  .....       2 8fe46a3eb557 01365c4cca56 000000000000 (re)

       3        31      2.  .....       3 fc3148072371 7b013192566a 8fe46a3eb557 (re)

       4        5.      25  .....       4 d40249267ae3 8fe46a3eb557 000000000000 (re)

  $ hg log

  changeset:   4:40d11a4173a8

  tag:         tip

  parent:      2:96b70246a118

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     two -> two-point-one

  changeset:   3:50c3a7e29886

  parent:      1:d1e159716d41

  parent:      2:96b70246a118

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     Merge 1

  changeset:   2:96b70246a118

  parent:      0:b1832b9d912a

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     Numbers as words

  changeset:   1:d1e159716d41

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     2 -> 2.5

  changeset:   0:b1832b9d912a

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     Initial

  $ cd ..