anchor.diff:     
   %%@private
   get_next_command(PrevResult) ->
  +    case PrevResult of 
  +        none -> ok;
  +        _ -> wrangler_io:format("The result returned by the previous refactoring:\n ~p\n", 
  +                                [PrevResult])
  +    end,
       Cmd=wrangler_cmd_server:get_next_command(PrevResult),
       case Cmd of 
           {ok, none, _ChangedFiles, [error, _Reason]} ->
  
positive.code:     case apply(Module, composite_refac, [Args0]) of
          {error, Reason} ->
              {error, Reason};
          Cmds ->
              Cmds1 = if is_list(Cmds) ->
                              Cmds;
                         true -> [Cmds]
                      end,
              try start_cmd_server(lists:flatten(Cmds1))
              catch
                  E1:E2 ->
                      erlang:error({E1,E2})
  
negative.code:             {ok, PreviewPairs}=wrangler_backup_server:recover_backups(),
              wrangler_preview_server:add_files({PreviewPairs, ""}),
              Cmd;
          {ok, C} ->
              wrangler_io:format("Next refactoring command:\n~p\n", [C]),
              Cmd;
          _ ->
              Cmd
      end.
  