commands: label from user is in local encoding
repo.branchtags().keys() are in UTF-8, so the label should be converted to UTF-8
before checking for a naming conflict. Keep the original label for ui.status()
# should print nothing
# should fail
abort: path 'b/x' is inside repo 'b'
abort: path 'b/x' is inside repo 'b'
# should fail
abort: path 'b/x' is inside repo 'b'
# should arguably print nothing
# should fail
abort: path 'b/a' is inside repo 'b'