patch 8.2.2393: Vim9: error message when script line starts with "[{"

Problem:    Vim9: error message when script line starts with "[{".
Solution:   Do not give an error for checking for end of list.

src/dict.c

@@ -1032,7 +1032,8 @@ eval_dict(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int literal)
 
     if (**arg != '}')
     {
-	semsg(_(e_missing_dict_end), *arg);
+	if (evalarg != NULL)
+	    semsg(_(e_missing_dict_end), *arg);
 failret:
 	if (d != NULL)
 	    dict_free(d);

src/testdir/test_vim9_script.vim

@@ -815,6 +815,12 @@ def Test_list_vimscript()
       # comment 6
   END
   assert_equal(['# comment 1', 'two', '# comment 3', '', 'five', '# comment 6'], lines)
+
+  lines =<< trim END
+    [{
+      a: 0}]->string()->assert_equal("[{'a': 0}]")
+  END
+  CheckDefAndScriptSuccess(lines)
 enddef
 
 if has('channel')

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2393,
 /**/
     2392,
 /**/