string_literal ::= "'" string "'" | "\"" string "\""

        Any successful match is converted to a single quoted string to simplify
        post-parsed operations.

def string_literal(self):
        """
        string_literal ::= "'" string "'" | "\"" string "\""

        Any successful match is converted to a single quoted string to simplify
        post-parsed operations.
        """
        return quotedString.setParseAction(
            lambda s, l, t: "'{string}'".format(string=removeQuotes(s, l, t)))