class RDoc::Markup::AttributeManager

def add_word_pair(start, stop, name)
  raise ArgumentError, "Word flags may not start with '<'" if
    start[0,1] == '<'
  bitmap = @attributes.bitmap_for name
  if start == stop then
    @matching_word_pairs[start] = bitmap
  else
    pattern = /(#{Regexp.escape start})(\S+)(#{Regexp.escape stop})/
    @word_pair_map[pattern] = bitmap
  end
  @protectable << start[0,1]
  @protectable.uniq!
end