title: Bootstrap 4 badge not working - just not showing up
body: <p>I'm trying to use bootstrap 4 badge in this way:</p>
  
  <pre><code>&lt;td&gt;&lt;span class="badge badge-warning"&gt;{{ object.get_type_display }}&lt;/span&gt;&lt;/td&gt;
  </code></pre>
  
  <p>I'm using:</p>
  
  <p><a href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.4/css/bootstrap.min.css" rel="noreferrer">https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.4/css/bootstrap.min.css</a></p>
  
  <p>What can be a reason?</p>