code: def tag_autocomplete_js(format_string=None):
      
      if format_string:
          context_list = format_string.split(' ')
          context = {
              'app_label':context_list[0],'model':context_list[1], 'counts':context_list[2]
          }
      else:
          context = {}
      return render_to_string('tagging_ext/tagging_autocomplete_js.html', context)
docs: format_string should be ``app_label model counts``
      
      renders 'tagging_ext/tag_autocomplete_js.html