\chardef\maxseclevel = 3
%
% A numbered section within an unnumbered changes to unnumbered too.
-% To achive this, remember the "biggest" unnum. sec. we are currently in:
+% To achieve this, remember the "biggest" unnum. sec. we are currently in:
\chardef\unmlevel = \maxseclevel
%
% Trace whether the current chapter is an appendix or not: