Log Message:-----------RETURN NEXT doc improvement, per Alvaro.
Modified Files:-------------- pgsql/doc/src/sgml: plpgsql.sgml (r1.120 -> r1.121) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/plpgsql.sgml?r1=1.120&r2=1.121)