Log Message:
-----------
Minor SGML improvements.
Modified Files:
--------------
pgsql/doc/src/sgml:
perform.sgml (r1.49 -> r1.50)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/perform.sgml.diff?r1=1.49&r2=1.50)
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