conv_markup

# File lib/rdoc/ri/formatter.rb, line 113
  def conv_markup(txt)
    txt = txt.gsub(%{<tt>(.*?)</tt>}, '+\1+')
    txt.gsub!(%{<code>(.*?)</code>}, '+\1+')
    txt.gsub!(%{<b>(.*?)</b>}, '*\1*')
    txt.gsub!(%{<em>(.*?)</em>}, '_\1_') 
    txt
  end