Log Message:
-----------
More fixes for => and ->, use proper ampersand markups.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
psql-ref.sgml (r1.130 -> r1.131)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml.diff?r1=1.130&r2=1.131)