py310 failure - AssertionError: Lists differ: ['[extra]'] != ['extra']

[Corey Bryant]

$ tox -e py310
...

==============================
Failed 1 tests - output below:
==============================

stevedore.tests.test_extension.TestExtensionProperties.test_extras
------------------------------------------------------------------

Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):

      File "/home/corey/pkg/zed/upstream/stevedore/stevedore/tests/test_extension.py", line 278, in test_extras
    self.assertEqual(['[extra]'], self.ext1.extras)

      File "/usr/lib/python3.10/unittest/case.py", line 845, in assertEqual
    assertion_func(first, second, msg=msg)

      File "/usr/lib/python3.10/unittest/case.py", line 1051, in assertListEqual
    self.assertSequenceEqual(list1, list2, msg, seq_type=list)

      File "/usr/lib/python3.10/unittest/case.py", line 1033, in assertSequenceEqual
    self.fail(msg)

      File "/usr/lib/python3.10/unittest/case.py", line 675, in fail
    raise self.failureException(msg)

    AssertionError: Lists differ: ['[extra]'] != ['extra']

First differing element 0:
'[extra]'
'extra'

- ['[extra]']
? - -

+ ['extra']

======
Totals
======
Ran: 92 tests in 0.2354 sec.
 - Passed: 90
 - Skipped: 1
 - Expected Fail: 0
 - Unexpected Success: 0
 - Failed: 1
Sum of execute time for each test: 0.1221 sec.