inconsistent behaviour between GNU and uutils `mv` for symlink-<slash> as source

Component

mv

Inconsistent Behaviour

To reproduce

mkdir foo-dir
ln -s foo-dir foo-link
gmv foo-link/ foo-dir # gmv cuz I'm on MacOS
uu-mv foo-link/ foo-dir

gmv returns gmv: cannot move 'link-to-dir/' to 'testdir/link-to-dir': Not a directory

While uu-mv returns uu-mv: cannot move 'link-to-dir/' to a subdirectory of itself, 'testdir/link-to-dir'

This was raised when I was experimenting to resolve #5451.

Cause and fix

src/uu/mv/src/mv.rs lacks in a checking mechanism (path_ends_with_terminator + is_symlink) for source. It goes all the way into checking if source and target are the same before throwing the error.

Could insert this mechanism at line 397.

If this issue is valid, can I claim and work on it?

Start with the reproduction commands using gmv and uu-mv, then inspect src/uu/mv/src/mv.rs around line 397 and the mentioned path_ends_with_terminator and is_symlink checks. Done means uu-mv reports the same not-a-directory behavior as GNU mv for a symlink with a trailing slash.