vim-patch:9.0.1290: CTRL-N and -P on cmdline don't trigger CmdlineChanged (#22151)

Problem:    CTRL-N and -P on cmdline don't trigger CmdlineChanged.
Solution:   Jump to cmdline_changed instead of cmdline_not_changed.
            (closes vim/vim#11956)

https://github.com/vim/vim/commit/af9e28a5b8f888b79459393ddb26fffe613c3f3c

Cherry-pick Test_Cmdline() change from patch 9.0.1039.

2 files changed, 46 insertions, 2 deletions

diff --git a/src/nvim/ex_getln.c b/src/nvim/ex_getln.c
index 76c3680742..eadeb839de 100644
--- a/src/nvim/ex_getln.c
+++ b/src/nvim/ex_getln.c
@@ -2015,7 +2015,7 @@ static int command_line_handle_key(CommandLineState *s)
       if (nextwild(&s->xpc, wild_type, 0, s->firstc != '@') == FAIL) {
         break;
       }
-      return command_line_not_changed(s);
+      return command_line_changed(s);
     }
     FALLTHROUGH;
 
@@ -2037,7 +2037,7 @@ static int command_line_handle_key(CommandLineState *s)
       if (nextwild(&s->xpc, wild_type, 0, s->firstc != '@') == FAIL) {
         break;
       }
-      return command_line_not_changed(s);
+      return command_line_changed(s);
     } else {
       switch (command_line_browse_history(s)) {
       case CMDLINE_CHANGED:
diff --git a/src/nvim/testdir/test_autocmd.vim b/src/nvim/testdir/test_autocmd.vim
index 83af0f6be0..a1a3ba3198 100644
--- a/src/nvim/testdir/test_autocmd.vim
+++ b/src/nvim/testdir/test_autocmd.vim
@@ -1897,6 +1897,50 @@ func Test_Cmdline()
   call assert_equal(':', g:entered)
   au! CmdlineChanged
 
+  let g:log = []
+  cnoremap <F1> <Cmd>call setcmdline('ls')<CR>
+  autocmd CmdlineChanged : let g:log += [getcmdline()]
+  call feedkeys(":\<F1>", 'xt')
+  call assert_equal(['ls'], g:log)
+  unlet g:log
+  au! CmdlineChanged
+  cunmap <F1>
+
+  let g:log = []
+  autocmd CmdlineChanged : let g:log += [getcmdline()]
+  call feedkeys(":sign \<Tab>\<Tab>\<C-N>\<C-P>\<S-Tab>\<S-Tab>\<Esc>", 'xt')
+  call assert_equal([
+        \ 's',
+        \ 'si',
+        \ 'sig',
+        \ 'sign',
+        \ 'sign ',
+        \ 'sign define',
+        \ 'sign jump',
+        \ 'sign list',
+        \ 'sign jump',
+        \ 'sign define',
+        \ 'sign ',
+        \ ], g:log)
+  let g:log = []
+  set wildmenu wildoptions+=pum
+  call feedkeys(":sign \<S-Tab>\<PageUp>\<kPageUp>\<kPageDown>\<PageDown>\<Esc>", 'xt')
+  call assert_equal([
+        \ 's',
+        \ 'si',
+        \ 'sig',
+        \ 'sign',
+        \ 'sign ',
+        \ 'sign unplace',
+        \ 'sign jump',
+        \ 'sign define',
+        \ 'sign undefine',
+        \ 'sign unplace',
+        \ ], g:log)
+  set wildmenu& wildoptions&
+  unlet g:log
+  au! CmdlineChanged
+
   au! CmdlineEnter : let g:entered = expand('<afile>')
   au! CmdlineLeave : let g:left = expand('<afile>')
   let g:entered = 0