[trivial patch] typo in doc/src/sgml/sepgsql.sgml

diff --git a/doc/src/sgml/sepgsql.sgml b/doc/src/sgml/sepgsql.sgml
index e45c258..ee0a255 100644
*** a/doc/src/sgml/sepgsql.sgml
--- b/doc/src/sgml/sepgsql.sgml
*************** UPDATE t1 SET x = 2, y = md5sum(y) WHERE
*** 358,364 **** </synopsis>      In this case we must have <literal>db_table:select</> in addition to
!     <literal>db_table:update</>, because <literal>t1.a</> is referenced     within the <literal>WHERE</> clause.
Column-levelpermissions will also be     checked for each referenced column.    </para> 
--- 358,364 ---- </synopsis>      In this case we must have <literal>db_table:select</> in addition to
!     <literal>db_table:update</>, because <literal>t1.z</> is referenced     within the <literal>WHERE</> clause.
Column-levelpermissions will also be     checked for each referenced column.    </para> 


(It is unclear to me why the same example is cited twice here, but the
text around them is consistent with that.)

Christoph
--
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