Cleaner version of the HTML5 Boilerplate Slim Ruby on Rails application.html template for Zurb Foundation 4.0. Thanks to https://gist.github.com/helloluis/1183106/#comment-375706.

application.html.slim

doctype html
/ paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/
/[if lt IE 7]
  html.ie6 lang="en"
/[if IE 7]
  html.ie7 lang="en"
/[if IE 8]
  html.ie8 lang="en"
/[if IE 9]
  html.ie9 lang="en"
| <!--[if (gt IE 9)|!(IE)]><!-->
html lang="en"
  | <!--<![endif]-->
  head
    meta charset="utf-8"

    / Uncomment to make IE8 render like IE7
    / meta http-equiv="X-UA-Compatible" content="IE=7"

    / Set the viewport width to device width for mobile
    meta name="viewport" content="width=device-width, initial-scale=1.0"

    title= content_for?(:title) ? yield(:title) : "Untitled"

    = stylesheet_link_tag "application"
    = javascript_include_tag "vendor/custom.modernizr"
    = csrf_meta_tags

  body

    == yield

    = javascript_include_tag "application"