title: filter boolean variable in a twig template
body: <p>I have a boolean variable(0, 1) in my database and I want to filter it to a word 0 for 'NO', and 1 for 'Yes'. how can I do that in a twig template</p>
  
  <p>I want something like   <code>{{ bool_var | '??' }}</code> where the '??' is the filter </p>