# File lib/rdoc/markup/attribute_manager.rb, line 123
  def convert_attrs(str, attrs)
    # first do matching ones
    tags = @matching_word_pairs.keys.join("")

    re = /(^|\W)([#{tags}])([#:\\]?[\w.\/-]+?\S?)\2(\W|$)/

    1 while str.gsub!(re) do
      attr = @matching_word_pairs[$2]
      attrs.set_attrs($`.length + $1.length + $2.length, $3.length, attr)
      $1 + NULL * $2.length + $3 + NULL * $2.length + $4
    end

    # then non-matching
    unless @word_pair_map.empty? then
      @word_pair_map.each do |regexp, attr|
        str.gsub!(regexp) {
          attrs.set_attrs($`.length + $1.length, $2.length, attr)
          NULL * $1.length + $2 + NULL * $3.length
        }
      end
    end
  end