!!!
%html
%head
%title= page_title yield(:page_title)
%meta{charset: "utf-8"}
%link{rel: "shortcut icon", href: image_path("favicon.png")}
%link{rel: "apple-touch-icon", href: image_path("apple-touch-icon.png")}
= stylesheet_link_tag :error_pages, media: "all"
= yield(:head)
%body{class: "error-#{@code}", id: "error_#{@code}"}
= yield