Log Message:
-----------
Spell out full archive directory specification in 'test -f' continuous
archiving example, per suggestion from Greg Smith.
Modified Files:
--------------
pgsql/doc/src/sgml:
backup.sgml (r2.150 -> r2.151)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/backup.sgml?r1=2.150&r2=2.151)