patch 9.0.0345: error message for list argument could be clearer

Problem:    Error message for list argument could be clearer.
Solution:   Include the argument number. (Yegappan Lakshmanan, closes #11027)
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index 41998aa..cee6a32 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -673,14 +673,14 @@
   func ListColors()
     call complete(col('.'), "blue")
   endfunc
-  call assert_fails('exe "normal i\<C-R>=ListColors()\<CR>"', 'E474:')
+  call assert_fails('exe "normal i\<C-R>=ListColors()\<CR>"', 'E1211:')
   func ListMonths()
     call complete(col('.'), test_null_list())
   endfunc
-  call assert_fails('exe "normal i\<C-R>=ListMonths()\<CR>"', 'E474:')
+  call assert_fails('exe "normal i\<C-R>=ListMonths()\<CR>"', 'E1298:')
   delfunc ListColors
   delfunc ListMonths
-  call assert_fails('call complete_info({})', 'E714:')
+  call assert_fails('call complete_info({})', 'E1211:')
   call assert_equal([], complete_info(['items']).items)
 endfunc