New rails app for working through http://www.rubyinside.com/how-to-rails-3-and-rspec-2-4336.html

rails/gerbil/app/assets/javascripts/application.js

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+// 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 .