% {\slowboxend{...\finishsplunt...}...}
%\end{verbatim}
% That is, \syntax{"\\slowboxbegin{"<tag>"}{"<stuff>"}"} starts a slow box,
-% beginning with \<stuff> if we're in \opt{show} mode.
+% beginning with \<stuff> if we're in \opt{show} mode; and
+% \syntax{"\\slowboxend{"<stuff>"}"} finishes it, ending with \<stuff>.
%
% The |\slowboxbegin| command has a |*|-variant, which causes the box to be
% typeset regardless of the current mode setting.