if match:
        code = match.group("code").rstrip()
        comment = match.group("comment")
        return code, comment
    return line, None


def replace_multiline_code_block(
    block_a: MultilineCodeBlockInfo, block_b: MultilineCodeBlockInfo
) -> list[str]:
    """
    Replace multiline code block `a` with block `b` leaving comments intact.