anchor.diff:  all() -> 
       test_lib:recompile(?MODULE),
       [pmatch, mixed, aliases, match_in_call, untuplify,
  -     shortcut_boolean, letify_guard, selectify, underscore].
  +     shortcut_boolean, letify_guard, selectify, underscore, coverage].
   
   groups() -> 
       [].
  
positive.code:     _ = is_list(Config),
      ok.
  
  id(I) -> I.
  
negative.code: 	 init_per_group/2,end_per_group/2,
  	 pmatch/1,mixed/1,aliases/1,match_in_call/1,
  	 untuplify/1,shortcut_boolean/1,letify_guard/1,
  	 selectify/1,underscore/1,coverage/1]).
  	 
  -include_lib("test_server/include/test_server.hrl").
  
  