code: def do_urlize(eval_ctx, value, trim_url_limit=None, nofollow=False,
                target=None, rel=None):
      
      policies = eval_ctx.environment.policies
      rel = set((rel or '').split() or [])
      if nofollow:
          rel.add('nofollow')
      rel.update((policies['urlize.rel'] or '').split())
      if target is None:
          target = policies['urlize.target']
      rel = ' '.join(sorted(rel)) or None
      rv = urlize(value, trim_url_limit, rel=rel, target=target)
      if eval_ctx.autoescape:
          rv = Markup(rv)
      return rv
docs: Converts URLs in plain text into clickable links.
  
      If you pass the filter an additional integer it will shorten the urls
      to that number. Also a third argument exists that makes the urls
      "nofollow":
  
      .. sourcecode:: jinja
  
          {{ mytext|urlize(40, true) }}
              links are shortened to 40 chars and defined with rel="nofollow"
  
      If *target* is specified, the ``target`` attribute will be added to the
      ``<a>`` tag:
  
      .. sourcecode:: jinja
  
         {{ mytext|urlize(40, target='_blank') }}
  
      .. versionchanged:: 2.8+
         The *target* parameter was added.