Prints the legal keywords to deliver.
The function deliver-keywords
prints the legal keywords to deliver.
If the default value for a particular keyword is non-nil, it is printed on the same line. The default is a form that is evaluated if the keyword was not passed to deliver, in the order that deliver-keywords
prints.
deliver-keywords
also prints a short documentation string for each keyword.
LispWorks Delivery User Guide - 10 Aug 2017