_ \code{*print-length*} are used.
_ \end{defvar}
_
-_ \begin{defmac}{extensions:}{def-source-context}{%
+_ \begin{defmac}{extensions:}{define-source-context}{%
_ \args{\var{name} \var{lambda-list} \mstar{form}}}
_
_ This macro defines how to extract an abbreviated source context from