anchor.diff:  
   	h3 2. Headers
   	p The headers are awesome
  -	div#header-code
  +	div#header-example
   		&lt;h1>This is a header 1&lt;/h1>
   		&lt;h2>This is a header 2&lt;/h2>
   		&lt;h3>This is a header 3&lt;/h3>
   
   	h3 3. Paragraphs
   	p Paragraphs contain cool text
  -	div#paragraph-code
  +	div#paragraph-example
   		&lt;p>My paragraph text&lt;/p>
   
   	h3 4. Links
   	p Links are interesting
  -	div#link-code
  +	div#link-example
   		&lt;a href="http://www.website.com">My website&lt;/a>
positive.code: 
  block content
  
  	script(type="text/javascript", src="/ace/ace.js")
  	script(type="text/javascript", src="/javascripts/study.js")
  
  
negative.code: 	input(type="button", value="Coding" onclick="window.location.href='/coding'")
  	input(type="button", value="Sumorobot" onclick="window.location.href='/sumorobot'")
  
  	h3 Online users:
  	div#online-users
  		p Loading users ...
  	div.clear
  
  	h3 Code collaboration
  	div#code
  
  	h3 1. Basic html structure
  	p The basic html structure consists of several things
  	div#basic-example
  		&lt;html>
  		|	&lt;head>
  		|		&lt;title>Title&lt;/title>
  