anchor.diff:  -export([twitter/2]).
   
   
  -twitter(undefined, _Context) ->
  -    undefined;
  -twitter(Input, Context) when is_binary(Input) ->
  -    twitter1(Input, 0, Context);
  -twitter(Input, _Context) ->
  -    Input.
  +twitter(undefined, _Context) -> undefined;
  +twitter(<<"<p>", _/binary>> = Input, _Context) -> Input;
  +twitter(Input, Context) when is_binary(Input) -> twitter1(Input, 0, Context);
  +twitter(Input, _Context) -> Input.
   
   twitter1(Input, Index, Context) when is_binary(Input) ->
       case Input of
  
positive.code:     end.
  
  twitter_hash_url(Hash) ->
      ["#<a href=\"http://twitter.com/#search?q=%23", Hash, "\">", Hash, "</a>"].
  
  
  process_binary_match(Pre, Insertion, SizePost, Post) ->
  
negative.code: 
  twitter1_at(Input, Index, Context) ->
      case Input of
          <<Name:Index/binary, Char, Post/binary>> when not(Char >= $a andalso Char =< $z
                                                            orelse
                                                            Char >= $A andalso Char =< $Z
                                                            orelse
                                                            Char >= $0 andalso Char =< $9
                                                            orelse Char =:= $_ orelse Char =:= $.
                                                           ) ->
              Html = twitter_at_url(Name),
  