add_word_pair

# File lib/rdoc/markup/simple_markup/inline.rb, line 222
    def add_word_pair(start, stop, name)
      raise "Word flags may not start '<'" if start[0] == ?<
      bitmap = Attribute.bitmap_for(name)
      if start == stop
        MATCHING_WORD_PAIRS[start] = bitmap
      else
        pattern = Regexp.new("(" + Regexp.escape(start) + ")" +
#                             "([A-Za-z]+)" +
                             "(\\S+)" +
                             "(" + Regexp.escape(stop) +")")
        WORD_PAIR_MAP[pattern] = bitmap
      end
      PROTECTABLE << start[0,1]
      PROTECTABLE.uniq!
    end