anchor.diff:  
   -include("triq.hrl").
   -include_lib("eunit/include/eunit.hrl").
  +
  +-include("generic.hrl").
   
   -compile(export_all).
   
  
positive.code:     [] = rotate([]).
  
  rewrite(Fun, Term) ->
      case Fun(Term) of
          continue ->
              do_rewrite(Fun, Term);
          {stop, NewTerm} ->
              NewTerm
      end.
  
  do_rewrite(Fun, [H|T]) ->
      [rewrite(Fun, H) | rewrite(Fun, T)];
  do_rewrite(_Fun, []) ->
      [];
  do_rewrite(Fun, Tuple) when is_tuple(Tuple) ->
      L = [rewrite(Fun, E) || E <- tuple_to_list(Tuple)],
      list_to_tuple(L);
  do_rewrite(_Fun, Term) ->
      Term.
  
  rewrite_correctly_callbacks_on_tuples_test() ->
      executing_on_new_process(
  
negative.code:       end).
  
  rewrite_value(Old, New, Struct) ->
      generic:transformb(?transform(Old, New), Struct).
  
  rewrite_key_value_tuple(Key, NewValue, Struct) ->
      generic:transformb(?transform({Key, _}, {Key, NewValue}), Struct).
  
  rewrite_tuples(Fun, Struct) ->
      rewrite(
  