anchor.diff:  -module(mochiweb_headers).
   -author('bob@mochimedia.com').
   -export([empty/0, from_list/1, insert/3, enter/3, get_value/2, lookup/2]).
  --export([get_primary_value/2]).
  +-export([delete_any/2, get_primary_value/2]).
   -export([default/3, enter_from_list/2, default_from_list/2]).
   -export([to_list/1, make/1]).
   -export([test/0]).
  
positive.code:             gb_trees:update(K1, {K0, V2}, T)
      end.
  
  %% Internal API
  
  expand({array, L}) ->
  
negative.code:                         H3),
      "application/x-www-form-urlencoded" = ?MODULE:get_primary_value(
                                               "content-type", H4),
      H4 = ?MODULE:delete_any("nonexistent-header", H4),
      H3 = ?MODULE:delete_any("content-type", H4),
      ok.
  
  %% @spec empty() -> headers()
  