patch 8.0.0412: menu test fails on MS-Windows

Problem:    Menu test fails on MS-Windows.
Solution:   Use a menu entry with only ASCII characters.
diff --git a/src/testdir/test_menu.vim b/src/testdir/test_menu.vim
index 8fdaa1f..f774566 100644
--- a/src/testdir/test_menu.vim
+++ b/src/testdir/test_menu.vim
@@ -23,7 +23,7 @@
 
   set langmenu=de_de
   source $VIMRUNTIME/menu.vim
-  call assert_match(':browse tabnew', execute(':menu File.In\ neuem\ Tab\ öffnen\.\.\.'))
+  call assert_match('browse confirm w', execute(':menu Datei.Speichern'))
 
   source $VIMRUNTIME/delmenu.vim
 endfunc