If a @<value-form> is omitted, then the value of the corresponding @<var>
is used. It is conventional usage for a macro to wrap @|once-only| around
its body so as to convert the arguments which it should evaluate into safe
- gensyms capturing their runtime values. (Not that the simple expansion
+ gensyms capturing their runtime values. (Note that the simple expansion
given above can't do this correctly.) A bare symbol may be written in
place of a singleton list.
\end{describe}