title: jinja2-humanize-extension - how to implement these into code?
body: <p>I would like to use the humanize functions in my jinja2 flask app and the example from the documentation was too vague for me. I installed the extensions with pip and tried to implement them as follows:</p>
  <p>What I would like to render is this:</p>
  <pre><code>&lt;small class=&quot;text-muted&quot;&gt;Time remaining: {{ ((submission.date_expiration - now)|naturaldelta()) }}&lt;/small&gt;
  </code></pre>
  <p>Although I keep getting the error: <code>jinja2.exceptions.TemplateAssertionError: No filter named 'naturaldelta'.</code></p>
  <p>I added <code>env = Environment(extensions=[&quot;jinja2_humanize_extension.HumanizeExtension&quot;])</code> to my <em>init</em>.py but realized this isn't adding the extensions properly. Does anyone have experience with this?</p>