code: protected function matchTemplate(
          /*# string */ &$template,
          array &$arguments
      )/*# : string */ {
          $count = substr_count($template, '%s');
          $size  = sizeof($arguments);
          if ($count > $size) {
              $arguments = $arguments + array_fill($size, $count - $size, '');
          } else {
              $template .= str_repeat(' %s', $size - $count);
          }
          return $this;
      }
docs: Match "%s" in template with the provided arguments.
  
  @param  string &$template
  @param  array &$arguments
  @return $this
  @access protected