Log Message:
-----------
Adjust examples to avoid using keywords as identifiers, per Honda Shigehiro.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
release_savepoint.sgml (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/release_savepoint.sgml.diff?r1=1.3&r2=1.4)
savepoint.sgml (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/savepoint.sgml.diff?r1=1.3&r2=1.4)