New section header style.

Fix up a few synopses.
diff --git a/Doc/lib/libgzip.tex b/Doc/lib/libgzip.tex
index 4bc7d80..3bae734 100644
--- a/Doc/lib/libgzip.tex
+++ b/Doc/lib/libgzip.tex
@@ -1,4 +1,5 @@
-\section{Standard Module \module{gzip}}
+\section{\module{gzip} ---
+         \program{gzip} compression and decompression using files.}
 \declaremodule{standard}{gzip}
 
 \modulesynopsis{Interfaces for \program{gzip} compression and