anchor.diff:      committed_seq,
       current_through_seq,
       seqs_in_progress = [],
  -    highest_seq_done = ?LOWEST_SEQ,
  +    highest_seq_done = {0, ?LOWEST_SEQ},
       source_log,
       target_log,
       rep_starttime,
  
positive.code:         target = Target,
          source_name = SourceName,
          target_name = TargetName,
          start_seq = StartSeq,
          source_seq = SourceCurSeq
      } = State = init_state(Rep),
  
  
negative.code:             NewHighestDone, SeqsInProgress, NewSeqsInProgress]),
      SourceCurSeq = source_cur_seq(State),
      couch_task_status:update(
          "Processed ~p / ~p changes", [element(2, NewThroughSeq), SourceCurSeq]),
      NewState = State#rep_state{
          stats = sum_stats([Stats, StatsInc]),
          current_through_seq = NewThroughSeq,
  