patch 8.2.2817: Vim9: script sourcing continues after an error

Problem:    Vim9: script sourcing continues after an error.
Solution:   Make an error in any command in "vim9script" abort sourcing.
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index fbc4d92..fa418b2 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -1768,14 +1768,14 @@
       var x = 1 / 0
       echo x
   END
-  CheckScriptFailureList(lines, ['E1154:', 'E121:'])
+  CheckScriptFailure(lines, 'E1154:')
 
   lines =<< trim END
       vim9script
       var x = 1 % 0
       echo x
   END
-  CheckScriptFailureList(lines, ['E1154:', 'E121:'])
+  CheckScriptFailure(lines, 'E1154:')
 
   lines =<< trim END
       var x: string  'string'