Log Message:
-----------
Add index entry for ::, per complaint from John Gage.
Modified Files:
--------------
pgsql/doc/src/sgml:
syntax.sgml (r1.145 -> r1.146)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/syntax.sgml?r1=1.145&r2=1.146)