patch 8.2.4507: test fails because of new error message

Problem:    Test fails because of new error message.
Solution:   Avoid the test fails.
diff --git a/src/testdir/test_vim9_cmd.vim b/src/testdir/test_vim9_cmd.vim
index 8a51eac..92b834c 100644
--- a/src/testdir/test_vim9_cmd.vim
+++ b/src/testdir/test_vim9_cmd.vim
@@ -1834,14 +1834,18 @@
       g #pat#cmd
   END
   v9.CheckDefAndScriptFailure(lines, 'E1242:', 1)
+
+  new
+  setline(1, 'some pat')
   lines =<< trim END
-      g#pat#cmd
+      g#pat#print
   END
   v9.CheckDefAndScriptSuccess(lines)
   lines =<< trim END
-      g# pat#cmd
+      g# pat#print
   END
   v9.CheckDefAndScriptSuccess(lines)
+  bwipe!
 
   lines =<< trim END
       s /pat/repl