Micro doc patch

Add missing quotes.

Index: docguide.sgml
===================================================================
RCS file: /projects/cvsroot/pgsql/doc/src/sgml/docguide.sgml,v
retrieving revision 1.55
diff -u -r1.55 docguide.sgml
--- docguide.sgml	9 Apr 2005 03:52:43 -0000	1.55
+++ docguide.sgml	13 May 2005 15:46:53 -0000
@@ -417,7 +417,7 @@
      <filename>/usr/local/share/sgml/catalog</filename> can also be
      made:
 <programlisting>
-CATALOG "docbook-dsssl-1.<replaceable>xx</>/catalog
+CATALOG "docbook-dsssl-1.<replaceable>xx</>/catalog"
 </programlisting>
      Because stylesheets change rather often, and it's sometimes
      beneficial to try out alternative versions,

Regards, Dave