old_contents: from adhocracy.lib.base import BaseController
  from adhocracy.lib.templating import render_json
  
  class StatsController(BaseController):
  
      def read_comments(self, format='json'):
          return render_json({})
  
new_contents: from adhocracy.lib.base import BaseController
  from adhocracy.lib.templating import render_json
  
  class StatsController(BaseController):
      """ This controller is an endpoint for AJAX requests that monitor user
      behavior. You'll want to enable `adhocracy.requestlog_active` to record
      them.  """
      def read_comments(self, format='json'):
          return render_json({})
  
subject: add documentation to stats controller