Log Message:
-----------
Remove mention that history is _now_ automatically saved on exit. It
has been that way for a long time.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
psql-ref.sgml (r1.154 -> r1.155)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml.diff?r1=1.154&r2=1.155)