patch 8.2.2888: Vim9: "k" command recognized in Vim9 script

Problem:    Vim9: "k" command recognized in Vim9 script.
Solution:   Do not recognize "k" or "s" and "d" with flags.
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 7114ae4..cdda613 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -3844,12 +3844,14 @@
   var lines =<< trim END
       ka
   END
-  CheckDefAndScriptFailure(lines, 'E1100:')
+  CheckDefFailure(lines, 'E476:')
+  CheckScriptFailure(['vim9script'] + lines, 'E492:')
 
   lines =<< trim END
       :1ka
   END
-  CheckDefAndScriptFailure(lines, 'E481:')
+  CheckDefFailure(lines, 'E476:')
+  CheckScriptFailure(['vim9script'] + lines, 'E492:')
 
   lines =<< trim END
     t