Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libgzip.tex b/Doc/lib/libgzip.tex
index a56e573..fd2bc28 100644
--- a/Doc/lib/libgzip.tex
+++ b/Doc/lib/libgzip.tex
@@ -1,4 +1,4 @@
-\section{Standard Module \sectcode{gzip}}
+\section{Standard Module \module{gzip}}
 \label{module-gzip}
 \stmodindex{gzip}