vim-patch:8.2.4334: command line popup menu not positioned correctly

Problem:    Command line popup menu not positioned correctly.
Solution:   Also use vim_strsize() on the existing text. (Naruhiko Nishino,
            closes vim/vim#9727)
68cc2b8a37

src/nvim/testdir/test_cmdline.vim

@@ -2033,6 +2033,17 @@ func Test_wildmenu_pum()
   call TermWait(buf)
   call VerifyScreenDump(buf, 'Test_wildmenu_pum_31', {})
 
+  " Tests a directory name contained full-width characters.
+  call mkdir('Xdir/あいう', 'p')
+  call writefile([], 'Xdir/あいう/abc')
+  call writefile([], 'Xdir/あいう/xyz')
+  call writefile([], 'Xdir/あいう/123')
+
+  call term_sendkeys(buf, "\<C-U>set wildmode&\<CR>")
+  call term_sendkeys(buf, ":\<C-U>e Xdir/あいう/\<Tab>")
+  call TermWait(buf)
+  call VerifyScreenDump(buf, 'Test_wildmenu_pum_32', {})
+
   call term_sendkeys(buf, "\<C-U>\<CR>")
   call StopVimInTerminal(buf)
   call delete('Xtest')

test/functional/ui/popupmenu_spec.lua

@@ -2192,6 +2192,23 @@ describe('builtin popupmenu', function()
     feed('<esc>')
     command('set wildmode=full')
 
+    -- Tests a directory name contained full-width characters.
+    feed(':e あいう/<Tab>')
+    screen:expect([[
+                                      |
+      {1:~                               }|
+      {1:~                               }|
+      {1:~                               }|
+      {1:~                               }|
+      {1:~                               }|
+      {1:~        }{s: 123            }{1:       }|
+      {1:~        }{n: abc            }{1:       }|
+      {1:~        }{n: xyz            }{1:       }|
+      :e あいう/123^                   |
+    ]])
+
+    feed('<esc>')
+
     -- check positioning with multibyte char in pattern
     command("e långfile1")
     command("sp långfile2")