Éric: I think copying a relative symlink should also be relative, and that's the behaviour of this patch. That was the use case that tripped me up with the original behaviour of shutil.move: a relative symlink which was dangling in its original location, but not once moved. (This was, believe it or not, intentional design....)

This is also the behaviour when src and dst are on the same filesystem. Basically my intention was to remove the distinction between "same filesystem" and "different filesystem."