It looks like in nautilus, when you select two files in the list view, and then right click on a third (unselected) file, it selects that file as well. So the menu clearly operates on three items in this case.
It looks like in nautilus, when you select two files in the list view, and then right click on a third (unselected) file, it selects that file as well. So the menu clearly operates on three items in this case.