pg_dump can generate invalid SQL syntax if an aclitem in pg_init_privs
contains a GRANT OPTION (an asterisk in the aclitemout() representation).
Also, pg_dump uses REVOKE GRANT OPTION FOR where it needs plain REVOKE. For
more details, see the log message in the attached patch. I recommend
reviewing "diff -w" output first. I'm not certain the test suite will always
find those REVOKE statements in the same order; if that order varies, one
regex will need more help.