[support] Hacking core (user)

[Clarke Robin]

Hi,
 
I have a requirement to include more information in the notification email that is sent to the site administrator when a user registers on the site (users can register, but admin approval is required to activate the account). The additional information required is the new user's email address. The only way I can think of satisfying this requirement is to change the User module in core (5.10).
 
I could simply change this one line in user.module:
      drupal_mail('user-register-approval-admin', $from, $subject, t("!username has applied for an account.\n\n!edit_uri", $variables), $from);

To this:
      drupal_mail('user-register-approval-admin', $from, $subject, t("!username (!mailto) has applied for an account.\n\n!edit_uri", $variables), $from);

But I am not really happy about changing core, especially after reading the first article on Planet Drupal at the moment (http://robloach.net/node/128) which says that the first rule of Drupal is to 'do not hack core'. I can see changes becoming very hard to track, especially when it comes to upgrade time.
 
So can someone suggest to me another way to acheive a solution to changing the content in this email?
 
Thanks
robin
 
 

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