def get_html_report_content(self, module: str) -> str:
        """Return the content of the HTML report for `module`."""
        filename = flat_rootname(module) + ".html"
        filename = os.path.join("htmlcov", filename)
        with open(filename, encoding="utf-8") as f:
            return f.read()
Return the content of the HTML report for `module`.
tests/test_html.py