def add_line_prefix(s: str, prefix: str, /, empty_lines=False) -> str:
    if empty_lines:
        predicate = (lambda line: True)
    else:
        predicate = None
    return textwrap.indent(s, prefix, predicate=predicate)
def add_line_prefix(s: str, prefix: str, /, empty_lines=False) -> str:
    if empty_lines:
        predicate = (lambda line: True)
    else:
        predicate = None
    return textwrap.indent(s, prefix, predicate=predicate)