New section header style.

Fix up a few synopses.
diff --git a/Doc/lib/libsoundex.tex b/Doc/lib/libsoundex.tex
index 83e8bc7..8073a8c 100644
--- a/Doc/lib/libsoundex.tex
+++ b/Doc/lib/libsoundex.tex
@@ -1,4 +1,5 @@
-\section{Built-in Module \module{soundex}}
+\section{\module{soundex} ---
+         None}
 \declaremodule{builtin}{soundex}
 
 \modulesynopsis{None}