anchor.diff:  
   %% API
   -export([uterms/2]).
  +-export([expand/2]).
   
   %%----------------------------------------------------------------------------
   %% API
  
positive.code: %%----------------------------------------------------------------------------
  %% Internal functions
  %%----------------------------------------------------------------------------
  
  tokenize(Str, Lang) ->
      RE = case Lang of
  
negative.code: 
  %% @doc Returns a list of terms with duplicates removed.
  -spec uterms(utf8_string(), iso_639_1()) -> [utf8_string()].
  uterms(Text, Lang) ->
      Str = expand(Text, Lang),
      plists:usort(
        plists:map(
          fun (T) -> (list_to_atom("doko_stemming_" ++ Lang)):stem(T) end,
  