title: Disable autoescaping in jinja2 on Appengine
body: <p>By default, jinja2 autoescapes everything, and I want to stop this. I'm using the following code in a BaseHandler class:</p>
  
  <pre><code>@webapp2.cached_property
  def jinja2(self):
      # Returns a Jinja2 renderer cached in the app registry.
      return jinja2.get_jinja2(app=self.app)
  </code></pre>
  
  <p>According to the <a href="http://webapp-improved.appspot.com/api/webapp2_extras/jinja2.html" rel="nofollow">docs</a>, get_jinja2() has a callable "factory" argument which defaults to Jinja2(). I presume I need change this to Jinja2(config={'autoescape':False}), but how do you specify arguments for the factory?</p>