Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libgdbm.tex b/Doc/lib/libgdbm.tex
index 0761991..8f2d7d1 100644
--- a/Doc/lib/libgdbm.tex
+++ b/Doc/lib/libgdbm.tex
@@ -1,4 +1,4 @@
-\section{Built-in Module \sectcode{gdbm}}
+\section{Built-in Module \module{gdbm}}
 \label{module-gdbm}
 \bimodindex{gdbm}