patch 8.2.1326: Vim9: skipping over white space after list

Problem:    Vim9: skipping over white space after list.
Solution:   Do not skip white space, a following [] would be misinterpreted.
            (closes #6552)  Fix a few side effects.
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index d5f67b4..9db5275 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -1219,7 +1219,7 @@
   call assert_fails('call prop_find({}, "x")', 'E474:')
   call assert_fails('call prop_find({"lnum" : -2})', 'E16:')
   call assert_fails('call prop_list(1, [])', 'E715:')
-  call assert_fails('call prop_list(-1 , {})', 'E16:')
+  call assert_fails('call prop_list(-1, {})', 'E16:')
   call assert_fails('call prop_remove([])', 'E474:')
   call assert_fails('call prop_remove({}, -2)', 'E16:')
   call assert_fails('call prop_remove({})', 'E968:')