title: What does the translator value tilda mean Symfony - fosUserBundle
body: <p>Trying out the fosUserBundle module. Nowhere in the documentation I can see the meaning of the tilda ~ while configuring fosUserBundle in Symfony.</p>
  
  <h1>app/config/config.yml</h1>
  
  <pre><code>             framework:
                  translator: ~
  </code></pre>