``rm`` : Removes parent directory

[AnirbanHalder654322]

Coreutils

mkdir d
rm -rf d/..

This removes all the files in parent directory of d.

GNU

mkdir d
rm -rf d/..

This fails and produces the error message below. rm: refusing to remove '.' or '..' directory: skipping 'd/..

This is related to the rm/r-4.sh compatibility test.

[just-an-engineer]

I'll take this one