Fix regression tests broken in fc7c281f.

This shouldn't have been committed without even running the tests (nor
were the tests added that were suggested). I'm fixing up the results
to get the buildfarm back to green, it's quite possible we'll want to
revert this later.

src/test/regress/expected/vacuum.out

@@ -146,7 +146,7 @@ ERROR:  column "does_not_exist" of relation "vacparted" does not exist
 ANALYZE (VERBOSE) does_not_exist;
 ERROR:  relation "does_not_exist" does not exist
 ANALYZE (nonexistent-arg) does_not_exist;
-ERROR:  syntax error at or near "-"
+ERROR:  syntax error at or near "arg"
 LINE 1: ANALYZE (nonexistent-arg) does_not_exist;
                              ^
 ANALYZE (nonexistentarg) does_not_exit;