title: Rails coffee script throws error
body: <p>I use rails 3.1.0rc4 and coffee-script 2.2.0.
  app/assets/javascripts/application.js includes:</p>
  
  <pre><code>//= require users
  </code></pre>
  
  <p>In app/assets/javascripts/users.js I have following code:</p>
  
  <pre><code>jQuery(document).ready(function($) {
      alert('OK');
  });
  </code></pre>
  
  <p>How to convert it to coffee-script? When I replace:</p>
  
  <pre><code>jQuery(document).ready
  </code></pre>
  
  <p>with</p>
  
  <pre><code>$-&gt;
  </code></pre>
  
  <p>and change the filename from users.js to users.js.coffee</p>
  
  <p>it throws ExecJS::RuntimeError.</p>