from typing import Iterable


def list_to_string(list_: Iterable[str], sep: str = ", ") -> str:
    """Transforms a list of names, like ['a', 'b', 'c'], into a single
    string of names, like "a, b, c"."""
    result = ["{c}".format(c=c.replace("'", "")) for c in list_]
    return sep.join(result)