Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index 424ca9c..f04f4dc 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -1,4 +1,4 @@
-\section{Built-in Module \sectcode{re}}
+\section{Built-in Module \module{re}}
 \label{module-re}
 
 \bimodindex{re}