[graph]
; Cherry-Pick 3 and Reintegrate
branches = [
  ('A', 'O0', 1, 7),
  ('O', None, 0, 0),
  ('B', 'O0', 1, 6),
  ]
changes = [
  'A1', 'B2', 'B3', 'B6',
  ]
merges = [
  (None, 'A1', 'B4', ''),
  (None, 'B3', 'A5', 'cherry 3'),
  (None, 'B6', 'A7', 'reint?'),
  ]
annotations = [
  ]