Log Message:
-----------
Fix incorrect example in CREATE INDEX reference page, per Josh Kupershmidt.
Also fix and uncomment an old example of creating a GIST index, and make
a couple of other minor editorial adjustments.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
create_index.sgml (r1.72 -> r1.73)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_index.sgml?r1=1.72&r2=1.73)