Forgotten-By: rgrimes, early '94 (see rev 1.3, 1.4).
2) Use 555-#### examples to avoid potentially expensive accidents.
3) Escape @ in example pn capability (see related FAQ.sgml question).
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
