title: Disable HTML escaping when manually rendering a Twig string
body: <p>I have the following code that renders a string into HTML output. How can I stop it from escaping the text for HTML?</p>
  
  <pre><code>$template = '{{ who }} bar';
  $params = array('who' =&gt; "Foo's");
  
  $twig = new \Twig_Environment(new \Twig_Loader_String);
  var_dump($twig-&gt;render($template, $params));
  </code></pre>
  
  <p>Outputs:</p>
  
  <pre><code>string(14) "Foo&amp;#039;s bar"
  </code></pre>
  
  <p>How can I make it output this instead?</p>
  
  <pre><code>string(14) "Foo's bar"
  </code></pre>
  
  <p>I understand that changing <code>'{{ who }} bar'</code> to <code>'{{ who|raw }} bar'</code> will fix the problem, but I want to solve this at the rendering stage. I do not want to change all of the templates.</p>