title: django templates string formatting
body: <p>I want to pad and cut too long chars. So I used stringformat. In this example, I want my string to be 10 characters long, with padding if necessary. I have this code in my django template</p>
  
  <pre><code>{{ "my too long or too short string"|stringformat:":10" }}
  </code></pre>
  
  <p>But django outputs nothing.</p>