Can't find autocomplete on MELPA

Question

So I'm following this guide and when I go to M-x package-list-packages there is no auto-complete in the directory.

; start pacakage.el with emacs
(require 'package)
; add Melpa to repository list
(add-to-list 'package-archives '("melpa", "http://melpa.milkbox.net/packages/"))
; initialise package.el
(package-initialize)

This is my ~/.emacs file.

Answer 1

Elements of package-archives should be conses, which can be written as dotted pairs:

; add Melpa to repository list
(add-to-list 'package-archives '("melpa" . "http://melpa.milkbox.net/packages/"))

Commas are never used in lisp code except when paired with backquote.