double includes

application.html.erb

    <%= stylesheet_link_tag    "application" %>
    <%= javascript_include_tag "https://js.stripe.com/v1/", "application" %>
    <%= javascript_include_tag "application" %>
    <%= csrf_meta_tags %>
    <%= tag :meta, :name => "stripe-key", :content => STRIPE_PUBLIC_KEY %>

application.js

// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
//= require twitter/bootstrap