Log Message:-----------Improve partitioning example, per Itagaki Takahiro.
Modified Files:-------------- pgsql/doc/src/sgml: ddl.sgml (r1.78 -> r1.79) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ddl.sgml?r1=1.78&r2=1.79)
