anchor.diff:  
   all() -> 
       test_lib:recompile(?MODULE),
  -    [test1,overwritten_fun,otp_7202,bif_fun,external,eep37,eep37_dup,badarity].
  -
  -groups() -> 
  -    [].
  +    [{group,p}].
  +
  +groups() ->
  +    [{p,[parallel],
  +      [test1,overwritten_fun,otp_7202,bif_fun,external,eep37,
  +       eep37_dup,badarity,badfun]}].
   
   init_per_suite(Config) ->
       Config.
  
positive.code:     {'EXIT',{{badarity,{_,[]}},_}} = (catch (fun badarity/1)()),
      ok.
  
  id(I) ->
      I.
  
negative.code: -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
  	 init_per_group/2,end_per_group/2,
  	 test1/1,overwritten_fun/1,otp_7202/1,bif_fun/1,
           external/1,eep37/1,eep37_dup/1,badarity/1,badfun/1]).
  
  %% Internal exports.
  -export([call_me/1,dup1/0,dup2/0]).
  