anchor.diff:       , "  print-related opts"
        , "arity        (false)       print arity instead of arg list"
        , "buffered     (false)       buffer messages till end of trace"
  -     , "print_pids   (false)       print pids instead of registered names"
        , "print_calls  (true)        print calls"
        , "print_file   (standard_io) print to this file"
        , "print_msec   (false)       print milliseconds on timestamps"
  
positive.code: 
  mk_outer(#cnf{file=[_|_]}) ->
    fun(_) -> ok end;
  mk_outer(#cnf{print_depth=Depth,print_msec=MS,print_pids=PP} = Cnf) ->
    OutFun = mk_out(Cnf),
    fun({Tag,Data,PI,TS}) ->
        MTS = fix_ts(MS,TS),
  
negative.code:           %% print-related
            arity        = false,        % arity instead of args
            buffered     = false,        % output buffering
            print_calls  = true,         % print calls
            print_file   = "",           % file to print to (standard_io)
            print_msec   = false,        % print milliseconds in timestamps?
  