!!!
%html
  %head
    %meta{:content => "text/html; charset=UTF-8", "http-equiv" => "Content-Type"}/
    %title Shopping cart
    = csrf_meta_tags
    = stylesheet_link_tag    "shopping_cart/application", media: "all"
    = javascript_include_tag "shopping_cart/application"
  %body.container
    %p.notice= notice
    %p.alert= alert
    = content_for?(:checkout) ? yield(:checkout) : yield