New section header style.

Fix up a few synopses.
diff --git a/Doc/lib/libshelve.tex b/Doc/lib/libshelve.tex
index 6b5aa76..4b7f773 100644
--- a/Doc/lib/libshelve.tex
+++ b/Doc/lib/libshelve.tex
@@ -1,4 +1,5 @@
-\section{Standard Module \module{shelve}}
+\section{\module{shelve} ---
+         Python object persistency.}
 \declaremodule{standard}{shelve}
 
 \modulesynopsis{Python object persistency.}