Log Message:
-----------
Documentation tweak: make <command>CREATE OPERATOR CLASS</command> into
an <xref/>.
Modified Files:
--------------
pgsql/doc/src/sgml:
xindex.sgml (r1.40 -> r1.41)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xindex.sgml.diff?r1=1.40&r2=1.41)