Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libselect.tex b/Doc/lib/libselect.tex
index ba234ab..b7a8c85 100644
--- a/Doc/lib/libselect.tex
+++ b/Doc/lib/libselect.tex
@@ -1,4 +1,4 @@
-\section{Built-in Module \sectcode{select}}
+\section{Built-in Module \module{select}}
 \label{module-select}
 \bimodindex{select}