anchor.diff:            li 10x faster than PHP
             li 6x faster than Ruby
             li The same as Clojure or Go
  -          li 1/2 the speed of Java
  +          li 1/2 the speed of Java or C#
             li 1/4 the speed of C++
   
           small
  
positive.code:             pre
                code.language-javascript.
                  void sayHello(String name) {
                      print('hello ' + name);
                  }
  
        section
  
negative.code:             label For-of
              pre
                code.language-javascript.
                  for (var x of [1, 2, 3]) { ... }
  
            li(class='codeAndLabel')
              label Generators
  