anchor.diff:  unassigned_to_assigned_case({N, Time, SPid, CPid}) ->
       Has = etorrent_pieceset:from_list([0], 3),
       {ok, [{0,0,1}, {0,1,1}]} = ?chunk_server:request_chunks(N, Has, 2),
  -    ?assertEqual({error, assigned}, ?chunk_server:request_chunks(N, Has, 1)).   
  +    ?assertEqual({error, assigned}, ?chunk_server:request_chunks(N, Has, 1)).
   
   -endif.
  
positive.code: code_change(_OldVsn, State, _Extra) ->
      {ok, State}.
  
  %%
  %% Given a tree of a peers currently open requests, return a list of
  %% tuples containing the piece index, offset and length of each request.
  
negative.code: 
              %% Only update the piece priority lists if the piece set that
              %% they track was updated in this piece state transition.
              NewPrioUnassigned = case UnassignedUpdated of
                  false -> PrioUnassigned;
                  true  -> update_priority(TorrentID, PrioUnassigned, NewUnassigned)
              end,
              NewPrioBegun = case BegunUpdated of
                  false -> PrioBegun;
                  true  -> update_priority(TorrentID, PrioBegun, NewBegun)
              end,
  
  
  