* Quotes an identifier using `backticks` or "double quotes" depending on the database type.
* MySQL uses `backticks` while basically everything else uses double quotes.
* Since MySQL is the odd one out here the double quotes are our generic
- * and we implement backticks in DatabaseMysql.
+ * and we implement backticks in DatabaseMysqlBase.
*
* @param string $s
* @return string