2.Variable assignments

Before:

var hello = "Hello";
var ret;
var num = 1;

And we also had inline variables in our for loop:

for(var i = 0; i < bar.length; i++) {
    var out = bar[i];


After:

var ret,
    out,
    hello = "Hello",
    num = 1,
    i = 0,
    l = bar.length;

What changed?