Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libsymbol.tex b/Doc/lib/libsymbol.tex
index bb103a3..0761405 100644
--- a/Doc/lib/libsymbol.tex
+++ b/Doc/lib/libsymbol.tex
@@ -1,4 +1,4 @@
-\section{Standard Module \sectcode{symbol}}
+\section{Standard Module \module{symbol}}
 \label{module-symbol}
 \stmodindex{symbol}