title: How can I use a Twig variable in Assetics 'javascript' tag?
body: <p>I'm using Assetic to include my scripts and need to pass the current locale. How would I do that?</p>
  
  <pre><code>{% javascripts
      '@MyBundle/Resources/public/components/moment/moment.js'
      '@MyBundle/Resources/public/components/moment/lang/' ~ app.request.locale ~ '.js'
   %}
  </code></pre>
  
  <p>String concatenation does not work and throws <strong>Unexpected token "operator" of value "~"</strong></p>