anchor.diff:              section
                   h2 CoffeeScript can offer you a lot
   
  -                ul
  -                    li 
  -                        |  no ===
  -                    li better switch
  -                    li function binding
  -                    li for-in, for-of
  -                    li handy literals @, ->, =>
  -                    li splats
  -                    li classes
  -                    li function default arguments
  -                    li destructuring assignment
  -                    li ranges
  +                h3 
  +                    | no more ===, better switch, function binding, for-in, for-of
  +                    | handy literals (@, ->, =>), splats, classes, default arguments, 
  +                    | destructuring assignment, ranges, ...
   
               section
                   h2 Cool story bro...
  
positive.code:                 h3 it's something worth trying
  
              section 
                  h2 Expressions
                  code.language-javascript
                      pre.
                          addTwo = function (x) { return x + 2; };
  
negative.code:                         Array.prototype.slice.call(arguments, 0);
  
              section
                  h2 Javascript is great but it has issues as well
  
              section
                  h2 So... how we can make JS better and preserve what's best in it?
  
              section
                  h2 ECMAScript Harmony
  