title: TemplateSyntaxError: expected token 'end of statement block', got '%'
body: <p>I'm going through the flask megatutorial by Miguel G. right now and I've hit this problem where when try to boot up the application using template inheritance for the html structure, I come across this error:</p>
  
  <p><strong>TemplateSyntaxError: expected token 'end of statement block', got '%'</strong>. </p>
  
  <p>My code looks like this, for reference.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html&gt;
  {% extends "base.html" %}
  {% block content % }
          &lt;h1&gt; Hello, {{user.nickname}}! &lt;/h1&gt;
          {% for post in posts %}
          &lt;div&gt;&lt;p&gt;{{post.author.nickname}} says: &lt;b&gt;{{post.body}}&lt;/b&gt;/&lt;p&gt;&lt;/div&gt;
          {% endfor %}
  {% endblock %}
  &lt;/html&gt;
  ~        </code></pre>
  </div>
  </div>
  </p>
  
  <p>any advice on what's going wrong with this would be greatly appreciated. Thanks!</p>