mv: -i shouldn't show error message if overwriting is declined

[cakebaker]

Setup:

$ mkdir example
$ touch a
$ cp a example/

With GNU mv:

$ mv a example/ -i
mv: overwrite 'example/a'? n
$ echo $?
1

With uutils mv:

$ cargo run mv a example/ -i
mv: overwrite 'example/a'? n
mv: cannot move 'a' to 'example/a': 
$ echo $?
1

It works fine if I specify the filename:

$ cargo run mv a example/a -i
mv: overwrite 'example/a'? n
$ echo $?
1

[sylvestre]

hmm, i am a bit confused @cakebaker
See:
#4630
and
#4627

[cakebaker]

Now I'm confused too ;-) I don't understand what you mean with your comment...

[sylvestre]

@cakebaker see upstream recent change:
coreutils/coreutils@7a69df8

#4731 is reverting my fix

[cakebaker]

The PR is incorrect, I added a test case in #4731 (comment) to reproduce the issue.