Remove all uses of \sectcode; we can now use logical markup everywhere.
diff --git a/Doc/lib/libpwd.tex b/Doc/lib/libpwd.tex
index 61de3fc..5275acd 100644
--- a/Doc/lib/libpwd.tex
+++ b/Doc/lib/libpwd.tex
@@ -1,4 +1,4 @@
-\section{Built-in Module \sectcode{pwd}}
+\section{Built-in Module \module{pwd}}
 \label{module-pwd}
 
 \bimodindex{pwd}