def skip_whitespace(self):
        while self.char:
            if self.char in WHITESPACE:
                self.advance()
            elif self.char == b";" and self.last in b"\r\n":
                while self.char and b"\r\n" not in self.char:
                    self.advance()
            else:
                return
dataset/ETHPy150Open grawity/hacks/lib/python/nullroute/sexp.py/SexpParser.skip_whitespace/swapped operands of `not in`