Problem with .strip("\n") in IMAP.py

[SimonMaths]

General informations

When using the oauth2_refresh_token_eval option in my configuration file I get the error below.
This appear to a problem with at least one of the following lines in offlineimap/repository/IMAP.py

440:                refresh_token = refresh_token.strip("\n")
457:                access_token = access_token.strip("\n")
474:                client_id = client_id.strip("\n")
491:                client_secret = client_secret.strip("\n")

as the problem is fixed by replacing ("\n") with (b"\n")

Configuration file offlineimaprc

This error occurs when using the configuration property:

   oauth2_refresh_token_eval = ...

Logs, error

Traceback (most recent call last):
File "/usr/share/offlineimap3/offlineimap/threadutil.py", line 146, in run
Thread.run(self)
File "/usr/lib/python3.11/threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "/usr/share/offlineimap3/offlineimap/accounts.py", line 283, in syncrunner
self.remoterepos = Repository(self, 'remote')
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/share/offlineimap3/offlineimap/repository/init.py", line 77, in new
return repo(name, account)
^^^^^^^^^^^^^^^^^^^
File "/usr/share/offlineimap3/offlineimap/repository/IMAP.py", line 43, in init
self.imapserver = imapserver.IMAPServer(self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/share/offlineimap3/offlineimap/imapserver.py", line 108, in init
self.oauth2_refresh_token = repos.getoauth2_refresh_token()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/share/offlineimap3/offlineimap/repository/IMAP.py", line 440, in getoauth2_refresh_token
refresh_token = refresh_token.strip("\n")
^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: a bytes-like object is required, not 'str'