code: public function run210Update()
  	{
  		$this->Database->query("ALTER TABLE `tl_style` ADD `positioning` char(1) NOT NULL default ''");
  		$this->Database->query("UPDATE `tl_style` SET `positioning`=`size`");
  		$this->Database->query("UPDATE `tl_module` SET `guests`=1 WHERE `type`='lostPassword' OR `type`='registration'");
  		$this->Database->query("UPDATE `tl_news` SET `teaser`=CONCAT('<p>', teaser, '</p>') WHERE `teaser`!='' AND `teaser` NOT LIKE '<p>%'");
  	}
docs: Version 2.10.0 update