title: Multiple blocks of same name in Jinja2
body: <p>In <a href="http://jinja.pocoo.org/" rel="noreferrer">Jinja2</a>, I have a base template like this:</p>
  
  <pre><code>&lt;title&gt;{% block title %}{% endblock %} - example.com&lt;/title&gt;
  [...]
  
  &lt;h1&gt; 
    {% block title %}{% endblock %} - example.com
  &lt;/h1&gt;
  </code></pre>
  
  <p>Jinja2, then, fails with the following message:</p>
  
  <pre><code>  lines = [self.message, '  ' + location]
  : block 'title' defined twice
  </code></pre>
  
  <p>It must be now evident as to what I am trying to do - to have the same title in two places: the TITLE tag and the H1 tag, but the part of the title is actually provided by other derived templates.</p>
  
  <p>How does one typically achieve this?</p>