* Note that this method must be called by reference as well:
*
* @code
- * $fields =& $query->getTables();
+ * $tables =& $query->getTables();
* @endcode
*
* @return
* on.
*
* Example:
- * <code>
+ * @code
* $query->addExpression('SUBSTRING(thread, 1, (LENGTH(thread) - 1))', 'order_field');
* $query->orderBy('order_field', 'ASC');
- * </code>
+ * @endcode
* @param $direction
* The direction to sort. Legal values are "ASC" and "DESC". Any other value
* will be converted to "ASC".