> Use dired-move-to-end-of-filename to find the proper place.
I see, this way we forget about the '@ -> ' or ' -> ' 
(or any other?).

Do you think is ok that fn contains such ' -> ' thing?
I would prefer if fn doesn't contain that.
So, the question is:
do we have a portable way to get the target of one link?
We may introduce something like:
dired-symlink-target (if doesn't exist)