typo in the very first example of the Primer (Second edition)

Dear WG,

The very first example in the Primer: Purchase Order - po.xml presents the 
the following markup:
....
 <comment>Hurry, my lawn is going wild<!/comment>
 ...

As you can see, the exclamation point slipped inside the closing tag... 
:).
This document is obviously malformed and not parsible by any compliant XML 
parser.

Regards,

V. T.