tests/copy.result1

   1 !a +
   2 !a      !b +
   3 !a      !b      !c
   4 !a      !b      c +T !c
   5 !a      !b      c       !d +
   6 !a      !b      c       d +T !d
   7 !a      !b      c       d       !e
   8 !a      !b      c       !d      !e
   9 !a      !b      c       !e
  10 !a      !c +
  11 !a      !c      !d
  12 !b
  13 b +T !a
  14 b       !b +
  15 b       !b      !c
  16 b       !b      c +T !c
  17 b       !b      c       !d +
  18 b       !b      c       d +T !d
  19 b       !b      c       d       !e
  20 b       !b      c       !d      !e
  21 b       !b      c       !e
  22 b       !c +
  23 b       !c      !d
  24 !bad_target
  25 bad_target ET non-existant
  26 !target-loop-a
  27 target-loop-a OT target-loop-b
  28 !target-loop-b
  29 target-loop-b OT target-loop-a
  30 !c +
  31 !c      !d +
  32 !c      d +T !d
  33 !c      d       !e
  34 !c      !d      !e
  35 !c      !e
  36 !d +
  37 !d      !e
  38 !x +
  39 !x      !y
  40 !x      y T !z
  41 !z