anchor.diff:  -include_lib("common_test/include/ct.hrl").
   -include_lib("kernel/include/file.hrl").
   
  --export([all/0, suite/0,
  -	 display/1, display_huge/0, display_string/1,
  +-export([all/0, suite/0, init_per_testcase/2, end_per_testcase/2]).
  +
  +-export([display/1, display_huge/0, display_string/1,
   	 erl_bif_types/1,guard_bifs_in_erl_bif_types/1,
   	 shadow_comments/1,list_to_utf8_atom/1,
   	 specs/1,improper_bif_stubs/1,auto_imports/1,
  
positive.code:     end.
  
  shadow_comments(_Config) ->
      ensure_erl_bif_types_compiled(),
  
      ErlangList = [{erlang,F,A} || {F,A} <- erlang:module_info(exports),
  				  not is_operator(F,A)],
      List0 = erlang:system_info(snifs),
  
negative.code:     end.
  
  guard_bifs_in_erl_bif_types(_Config) ->
      List0 = erlang:system_info(snifs),
      List = [{F,A} || {erlang,F,A} <- List0,
  		     erl_internal:guard_bif(F, A)],
  