Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/mac/libmacdnr.tex b/Doc/mac/libmacdnr.tex
index 1df4a58..2aa07f5 100644
--- a/Doc/mac/libmacdnr.tex
+++ b/Doc/mac/libmacdnr.tex
@@ -1,4 +1,4 @@
-\section{Built-in Module \sectcode{macdnr}}
+\section{Built-in Module \module{macdnr}}
 \label{module-macdnr}
 \bimodindex{macdnr}