Log Message:-----------Simplify trigger example, per Mark Kirkwood.
Modified Files:-------------- pgsql/doc/src/sgml: plpgsql.sgml (r1.56 -> r1.57) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/plpgsql.sgml.diff?r1=1.56&r2=1.57)
