bug#42537: 28.0.50; wdired-test-bug34915 test failing on macOS

[Robert Pluim]

>>>>> On Tue, 04 Aug 2020 14:32:13 +0200, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:
    Lars> ;; 1. For dired to work on a host which marks symlinks with a 
trailing @ in
    Lars> ;;    an ls -alF listing, you need to (setq dired-ls-F-marks-symlinks 
t).
    Lars> ;;    Most UNIX systems do not do this, but ULTRIX does.

    Lars> And Macos is another:

    Lars> larsi@space /tmp % ls -alF /tmp/
    Lars> total 0
    Lars> drwxrwxrwt  8 root   wheel  256 Aug  4 14:12 ./
    Lars> drwxr-xr-x  6 root   wheel  192 Aug  2 18:53 ../
    Lars> -rw-r--r--  1 larsi  wheel    0 Aug  4 14:09 bar
    Lars> lrwxr-xr-x  1 larsi  wheel    3 Aug  4 14:09 foo@ -> bar
    Lars> lrwxr-xr-x  1 larsi  wheel    3 Aug  4 14:10 foo3@ -> bar
    Lars> lrwxr-xr-x  1 larsi  wheel    3 Aug  4 14:12 foo4@ -> bar

    Lars> OK, I've now adjusted the test and fixed the doc string to
    Lars> dired-ls-F-marks-symlinks in Emacs 28.

Ah, this explains why the test wasnʼt failing for me: I installed GNU
ls :-)

Robert