gistfile1.rb

munch do |h|
  (h / 'div.img').each do |img|
    src = (img % 'img').attributes['src']
    (img / 'img').remove
    text = img.inner_html
    
    img.swap("<div class=\"ImageRight\"><div><img src=\"#{src}\" /></div><div>#{text}</div></div>")
  end
end