anchor.diff:    maybe_delete("foo0.trc").
   
   t_9_test() ->
  -  Filename = "redbug.txt",
  +  Filename = "redbug9.txt",
     Options = [{print_file, Filename}, {time, 999}, {print_return, false}],
     {_,_} = redbug:start("lists:sort->return",[debug|Options]),
     [1,2,3] = lists:sort([3,2,1]),
  
positive.code:   ?assertEqual(<<"lists:sort([3,2,1])">>,
                 get_line_seg(Filename,2,2)),
    ?assertEqual(<<"lists:sort/1">>,
                 get_line_seg(Filename,3,6)),
    maybe_delete(Filename).
  
  t_6_test() ->
    Filename = "redbug.txt",
    {_,_} = redbug:start("lists:sort->count",
                         [{print_file,Filename},{time,999},debug]),
    [1,2,3] = lists:sort([3,2,1]),
  
negative.code: -include_lib("eunit/include/eunit.hrl").
  
  t_0_test() ->
    Filename = "redbug0.txt",
    {_,_} = redbug:start("lists:sort",[{print_file,Filename},print_msec,debug]),
    [1,2,3] = lists:sort([3,2,1]),
    timer:sleep(100),
  