docs: def handle_endtag(self, tag):
          """Function called for ending of tags"""
          if tag.lower() in self.allowed_tag_whitelist:
              self.result += '</' + tag + '>'
          else:
              if self.render_unallowed_tags:
                  self.result += '&lt;/' + cgi.escape(tag) + '&gt;'
  
          if tag == 'style' or tag == 'script':
              self.silent = False