# File lib/htmldiff.rb, line 155
    def add_matching_words_right(match_in_old, match_in_new, match_size, end_in_old, end_in_new)
      while match_in_old + match_size < end_in_old and 
            match_in_new + match_size < end_in_new and
            @old_words[match_in_old + match_size] == @new_words[match_in_new + match_size]
        match_size += 1
      end
      [match_in_old, match_in_new, match_size]
    end