Anybody can tell me how to reserve the comments in the procedure

[Moon's Father]

When I execute the following statements in the command line:

DELIMITER $$

DROP PROCEDURE IF EXISTS `t_girl`.`sp_test`$$

CREATE DEFINER=`web_131`@`%` PROCEDURE `sp_test`()
BEGIN
  -- Created by david yeung 20080430.
  select version();
END$$

DELIMITER ;
But the result is not my expected,there are no comments in the routine's
body.

mysql> show create procedure sp_test;
+-----------+-----------------------+-------------------------------------------------------------------------------------+
| Procedure | sql_mode              | Create
Procedure
|
+-----------+-----------------------+-------------------------------------------------------------------------------------+
| sp_test   | NO_AUTO_VALUE_ON_ZERO | CREATE DEFINER=`web_131`@`%` PROCEDURE
`sp_test`()
BEGIN

  select version();
END |
+-----------+-----------------------+-------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

Can anybody give me a solution to solve this problem.
Any *appreciate* is welcome.
-- 
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