vim-patch:8.1.1378: delete() can not handle a file name that looks like a pattern (#12784)

Problem:    Delete() can not handle a file name that looks like a pattern.
Solution:   Use readdir() instead of appending "/*" and expanding wildcards.
            (Ken Takata, closes vim/vim#4424, closes vim/vim#696)
701ff0a3e5

src/nvim/testdir/test_command_count.vim

@@ -103,6 +103,8 @@ endfunc
 
 func Test_command_count_2()
   silent! %argd
+  cd
+
   arga a b c d
   call assert_fails('5argu', 'E16:')