anchor.diff:  
   -spec log(atom(), integer(), string(), list()) -> ok.
   log(Module, Code, Fmt, Args) ->
  -    error_logger:info_msg("Logging ~p:~p(~p, ~p)~n",
  -                          [Module, Code, Fmt, Args]),
  +    error_logger:info_msg("ns_log: logging ~p:~p(~p)~n",
  +                          [Module, Code, lists:flatten(io_lib:format(Fmt, Args))]),
       gen_server:cast({global, ?MODULE}, {log, Module, Code, Fmt, Args}).
   
   -spec recent() -> list(#log_entry{}).
  
positive.code: 
  % Number of recent log entries.
  -define(RB_SIZE, 50).
  
  -behaviour(gen_server).
  -behavior(ns_log_categorizing).
  
negative.code: 
  -include_lib("eunit/include/eunit.hrl").
  
  -record(state, {recent, dedup}).
  
  start_link() ->
      Result = gen_server:start_link({global, ?MODULE}, ?MODULE, [], []),
  