Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libcopy.tex b/Doc/lib/libcopy.tex
index 1d1fd22..4e43585 100644
--- a/Doc/lib/libcopy.tex
+++ b/Doc/lib/libcopy.tex
@@ -1,4 +1,4 @@
-\section{Standard Module \sectcode{copy}}
+\section{Standard Module \module{copy}}
 \label{module-copy}
 \stmodindex{copy}
 \setindexsubitem{(copy function)}