python-readme-renderer fails to build with python-pygments 2.19.1 in Fedora 43.
I intend to update python-pygments in Fedora Rawhide in ~1 week.

There may be an upstream solution to the issue (not tested), see:
https://github.com/pypa/readme_renderer/commit/04d5cfe76850192364eff344be7fe27730af8484 

The failure:

_____________________ test_rst_fixtures[test_rst_008.rst] ______________________

rst_filename = PosixPath('/builddir/build/BUILD/python-readme-renderer-44.0-build/readme_renderer-44.0/tests/fixtures/test_rst_008.rst')
html_filename = PosixPath('/builddir/build/BUILD/python-readme-renderer-44.0-build/readme_renderer-44.0/tests/fixtures/test_rst_008.html')

    @pytest.mark.parametrize(
        ("rst_filename", "html_filename"),
        [
            (pytest.param(fn, fn.with_suffix(".html"), id=fn.name))
            for fn in Path(__file__).parent.glob("fixtures/test_*.rst")
        ],
    )
    def test_rst_fixtures(rst_filename, html_filename):
        # Get our Markup
        with open(rst_filename, encoding='utf-8') as f:
            rst_markup = f.read()
    
        # Get our expected
        with open(html_filename, encoding="utf-8") as f:
            expected = f.read()
    
        out = render(rst_markup)
    
        if "<" in expected:
>           assert out == expected
E           assert '<p>Here is s...code></pre>\n' == '<p>Here is s...code></pre>\n'
E             
E               <p>Here is some Python code for a <span class="docutils literal">Dog</span>:</p>
E             - <pre><code><span class="k">class</span> <span class="nc">Dog</span><span class="p">(</span><span class="n">Animal</span><span class="p">):</span><span class="w">
E             ?                                        -
E             + <pre><code><span class="k">class</span><span class="w"> </span><span class="nc">Dog</span><span class="p">(</span><span class="n">Animal</span><span class="p">):</span><span class="w">
E             ?                                             ++++++++++++++++++++++++
E             - </span>    <span class="k">def<...
E             
E             ...Full output truncated (19 lines hidden), use '-vv' to show

tests/test_rst.py:28: AssertionError

The testing takes place in COPR:
https://copr.fedorainfracloud.org/coprs/ksurma/pygments-2.19.1-f43/package/python-readme-renderer