Hello Viorel:

Thank you for the report and for using Roundup.

The test failure is a false positive. The code will work correctly in production.

This was addressed last October in development. The commit was:

====
changeset:   6995:dc83ebff4c90
user:        John Rouillard <rouilj@...>
date:        Sun Oct 02 23:18:43 2022 -0400
files:       test/html_norm.py test/test_templating.py
description:
change test to use html normalizer when comparing html output.

Update to Markdown2 parser changed text output keeping same html
semantics. Broke test_string_markdown_code_block_attribute test.  I
hand patched it to get tests working but it needed a better solution.

Write a simple html normalizer using HTMLParser so I don't need third
party (lxml, beautifulsoup) library to clean up the test.

Use the normalizer to parser the expected result and the result
returned by the various markdown libraries. Hopefully this will make
the test less fragile.

This can have multiple uses in template testing where html is
compared. I expect to have to change html_norm.py to make test
writing easier in the future.
=====

Have a great day and I hope you enjoy using Roundup.