Log Message:
-----------
Fix grammar
backpatched to 8.1
Tags:
----
REL8_3_STABLE
Modified Files:
--------------
pgsql/doc/src/sgml:
perform.sgml (r1.68 -> r1.68.2.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/perform.sgml?r1=1.68&r2=1.68.2.1)