\begin{describe}{mac}{aif @<condition> @<consequent> @[@<alt>@]}
\end{describe}
+\begin{describe}{mac}{aand @<form>^*}
+\end{describe}
+
\begin{describe}{mac}{awhen @<condition> @<form>^*}
\end{describe}
\end{describe}
\begin{describe}{fun}
- {merge-lists @<lists> \&key :pick (:test \#'eql) @> @<list>}
+ {merge-lists @<lists> \&key :pick (:test \#'eql) :present @> @<list>}
\end{describe}
\begin{describe}{mac}