anchor.diff:          , equiv/1
           , cons/1
           , stack/1
  +        , reduce/1
           , complete_coverage/1
           ]).
  +
  +-clojure(true).
   
   -type config() :: list().
   -type result() :: {comments, string()}.
  
positive.code: 
    {comments, ""}.
  
  -spec complete_coverage(config()) -> result().
  complete_coverage(_Config) ->
    ?NIL = 'clojerl.List':'_'(?NIL),
  
negative.code:   List2 = clj_core:list(?NIL),
    ?NIL = clj_core:seq(List2),
  
    List = clj_core:list(clj_core:cons(1, [2, 3])),
  
    {comments, ""}.
  
  -spec count(config()) -> result().
  