patch 9.0.1698: Test_map_restore_sid fails in GUI

Problem: Test_map_restore_sid fails in GUI
Solution: Feed an unsimplified Ctrl-B

closes: #12770

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
diff --git a/src/testdir/test_map_functions.vim b/src/testdir/test_map_functions.vim
index 4c62f89..c656368 100644
--- a/src/testdir/test_map_functions.vim
+++ b/src/testdir/test_map_functions.vim
@@ -511,7 +511,7 @@
   new
   source Xmapscript
   inoremap <buffer> <C-B> <Cmd>call RestoreMap()<CR>
-  call feedkeys("i\<CR>\<C-B>\<CR>", 'xt')
+  call feedkeys("i\<CR>\<*C-B>\<CR>", 'xt')
   call assert_equal(['', '42', '42'], getline(1, '$'))
 
   bwipe!