patch 8.0.0708: some tests are old style

Problem:    Some tests are old style.
Solution:   Change a few tests from old style to new style. (pschuh,
            closes #1813)
diff --git a/src/testdir/main.aap b/src/testdir/main.aap
index 821aa2d..93159ba 100644
--- a/src/testdir/main.aap
+++ b/src/testdir/main.aap
@@ -8,7 +8,7 @@
 		test7.out test8.out test9.out test11.out
 		test12.out  test13.out test14.out test15.out test17.out
 		test18.out test19.out test20.out test21.out test22.out
-		test23.out test24.out test25.out test26.out test27.out
+		test25.out test27.out
 		test28.out test29.out test30.out test31.out test32.out
 		test33.out test34.out test36.out test37.out
 		test38.out test39.out test40.out test41.out test42.out