title: Class with whitespace in jade.js templating
body: <p>I'm toying around with jade.js and "Bootstrap, from twitter". Bootstrap has some classes with names that got whitespaces such as "nav secondary-nav".</p>
  
  <p>In jade.js you define a div with div.classname but I can't do it like div.class name, 
  anyone knows how I can do this some other way?</p>
  
  <p>Thanks</p>