Bug#1061793: commonmark-bkrs fails its autopkg tests with Python 3.12

[Matthias Klose]

Package: src:commonmark-bkrs
Version: 0.5.4+ds-7
Severity: important
Tags: sid trixie ftbfs
User: debian-pyt...@lists.debian.org
Usertags: python3.12
With python3-defaults from experimental, the package fails its autopkg 
tests:

[...]
380s Test #443
380s tick
380s 432 tests passed, 11 failed
380s runtime: 0.048015499s
381s autopkgtest [13:36:06]: test command1: -----------------------]
381s command1             FAIL stderr: 
/usr/share/doc/python-commonmark-bkrs-doc/examples/tests/test-CommonMark.py:67: 
SyntaxWarning: invalid escape sequence '\.'
381s autopkgtest [13:36:06]: test command1:  - - - - - - - - - - results 
- - - - - - - - - -
381s autopkgtest [13:36:06]: test command1:  - - - - - - - - - - stderr 
- - - - - - - - - -
381s 
/usr/share/doc/python-commonmark-bkrs-doc/examples/tests/test-CommonMark.py:67: 
SyntaxWarning: invalid escape sequence '\.'
381s   testMatch = 
re.findall(re.compile("^\.\n([\s\S]*?)^\.\n([\s\S]*?)^\.$|^#{1,6} 
*(.*)$", re.M), tests)
381s autopkgtest [13:36:06]: @@@@@@@@@@@@@@@@@@@@ summary
381s command1             FAIL stderr: 
/usr/share/doc/python-commonmark-bkrs-doc/examples/tests/test-CommonMark.py:67: 
SyntaxWarning: invalid escape sequence '\.'


11 failed, but no error exit?