Log Message:
-----------
Fix missing parenthesis, per Guillaume Lelarge.
Modified Files:
--------------
pgsql/doc/src/sgml:
maintenance.sgml (r1.82 -> r1.83)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/maintenance.sgml?r1=1.82&r2=1.83)