[Pkg-mailman-hackers] Bug#1103587: hyperkitty: autopkgtest regression with mistune 3.1.3-1

[Chris Hofstaedtler]

Source: hyperkitty
Version: 1.3.12-3
Severity: serious
X-Debbugs-Cc: mistune at packages.debian.org
Control: affects -1 src:mistune

hyperkitty's autopkgtests fail with mistune 3.1.3-1 on all archs.
Example log:

https://ci.debian.net/packages/h/hyperkitty/testing/amd64/60157623/

338s ======================================================================
338s FAIL: test_header (hyperkitty.tests.test_templatetags.TestDecorate.test_header)
338s ----------------------------------------------------------------------
338s Traceback (most recent call last):
338s   File "/usr/lib/python3/dist-packages/hyperkitty/tests/test_templatetags.py", line 220, in test_header
338s     self.assertEqual(
338s     ~~~~~~~~~~~~~~~~^
338s         result.strip(),
338s         ^^^^^^^^^^^^^^^
338s         '<p># This is another sample text.</p>')
338s         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
338s AssertionError: '<h1>This is another sample text.</h1>' != '<p># This is another sample text.</p>'
338s - <h1>This is another sample text.</h1>
338s ?  ^^                               ^^
338s + <p># This is another sample text.</p>
338s ?  ^ ++                              ^
338s