Goal:
    A : Type  i : positive  j : positive  m : tree' A
  ============================
   (i <> j -> get i (rem' j m) = get' i m)


DEBUG:Going to execute:
<coq-core.plugins.ltac::revert@0> $1
DEBUG LTAC Evaluated term: (remove' j m)
DEBUG LTAC Evaluated term: (rem' j m)