anchor.diff:  %% Get the argument lists for a function in a module.
   %% Return: [Arglist]
   %% Arglist = [string()]
  -get_arglists(ModName, FunName) when is_list(ModName), is_list(FunName) ->
  +get_arglists(ModName, FunName) when list(ModName), list(FunName) ->
       arglists(to_atom(ModName), FunName).
   
   arglists(Mod, Fun) ->
  
positive.code: 
  -export([gl_proxy/1, tracer_init/2, null_gl/0]).
  
  -compile(export_all).   
  
  to_bin(X) -> list_to_binary(to_list(X)).
  to_atom(X) -> list_to_atom(to_list(X)).
  
negative.code: 
  tracer_loop(Tracer, Tracee) ->
      receive
          Trace when tuple(Trace),
                     element(1, Trace) == trace,
                     element(2, Trace) == Tracee ->
              Msg = tracer_format(Trace),
  