Log Message:
-----------
Fix typo:
< Such indexes could be more compact if there are few unique value.
> Such indexes could be more compact if there are only a few unique values.
Modified Files:
--------------
pgsql/doc:
TODO (r1.1391 -> r1.1392)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1391&r2=1.1392)