Linux sudo raises UnexpectedExit instead of AuthFailure on incorrect password

[nelsyeung]

On Linux, invoke.sudo raises UnexpectedExit instead of AuthFailure on incorrect password.

>>> import invoke
>>> invoke.sudo("ls", password="a")
[sudo] password: Sorry, try again.
[sudo] password: Sorry, try again.
[sudo] password: sudo: 3 incorrect password attempts
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/__init__.py", line 68, in sudo
    return Context().sudo(command, **kwargs)
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/context.py", line 170, in sudo
    return self._sudo(runner, command, **kwargs)
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/context.py", line 215, in _sudo
    return runner.run(cmd_str, watchers=watchers, **kwargs)
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/runners.py", line 376, in run
    return self._run_body(command, **kwargs)
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/runners.py", line 432, in _run_body
    return self.make_promise() if self._asynchronous else self._finish()
  File "/home/nelson/foo/.venv/lib/python3.7/site-packages/invoke/runners.py", line 499, in _finish
    raise UnexpectedExit(result)
invoke.exceptions.UnexpectedExit: Encountered a bad command exit code!

Command: "sudo -S -p '[sudo] password: ' ls"

Exit code: 1

Stdout: already printed

Stderr: already printed

Version info

invoke: 2.0.0 (also tested on 1.7.1) OS: Ubuntu 20.04.5 LTS Python: 3.7.13 (also tested on 3.8.13 and 3.10.5)

I tested this on macOS and it raises AuthFailure as expected.