tests/list.result7

   1 a +
   2 a       b +
   3 a       b       c OT c  d
   4 a       c +
   5 a       c       d
   6 b +T a
   7 b       b +
   8 b       b       c OT c  d
   9 b       c +
  10 b       c       d
  11 bad_target ET non-existant
  12 target-loop-a OT target-loop-b
  13 target-loop-b OT target-loop-a
  14 c +
  15 c       d +T a
  16 c       d       b +
  17 c       d       b       c OT c  d
  18 c       d       c +
  19 c       d       c       d
  20 c       e
  21 d +
  22 d       e
  23 x +
  24 x       y T z
  25 z