title: How to add rst format in nodes for directive?
body: <p>How I can use rst in nodes? For example I want to output icluded file <code>about.rst</code></p>
  
  <pre class="lang-py prettyprint-override"><code>class Foo(Directive):
  
      def run(self):
          return [
              nodes.Text("**adad**"),  # &lt;-- Must be a bold text
              nodes.Text(".. include:: about.rst"),  # &lt;-- Must include file
          ]
  </code></pre>