New section header style.

Fix up a few synopses.
diff --git a/Doc/lib/libpoplib.tex b/Doc/lib/libpoplib.tex
index 2c21a7f..e3ec5e1 100644
--- a/Doc/lib/libpoplib.tex
+++ b/Doc/lib/libpoplib.tex
@@ -3,7 +3,8 @@
 %it since I just stole most of it from the poplib.py source code and
 %the imaplib ``chapter''.
 
-\section{Standard Module \module{poplib}}
+\section{\module{poplib} ---
+         POP3 protocol client.}
 \declaremodule{standard}{poplib}
 
 \modulesynopsis{POP3 protocol client (requires sockets).}