def regexp(__string: str, __pattern: str, __repl: Union[Callable, str], *,
           count: int = 0, flags: int = 0) -> str:
    """Jinja filter for regexp replacements.

    See :func:`re.sub` for documentation.

    Returns:
        Text with substitutions applied
    """
    return re.sub(__pattern, __repl, __string, count, flags)