IE, Opera, Chrome doesn't remove comments after function.toString() coercion

function_comments.js

function f(){/* comment */}

alert(f+'');


// Opera, IE, Chrome: function f(){/* comment */}
// Firefox, Safari: function f(){}
//
// Note: in Firefox: f+'' === f.toSource()

static_typing.js

function square (x/*:Number*/)/*:Number*/ {
  return x*x
}