def set_subtract(self, a, b):
        result = []
        for x in a:
            if x not in b:
                result.append(x)
        return result
Test if Include was correctly parsed.
dataset/ETHPy150Open smurfix/yapps/yapps/parsetree.py/Generator.set_subtract--crossover with--dataset/ETHPy150Open letsencrypt/letsencrypt/certbot-apache/certbot_apache/tests/complex_parsing_test.py/ComplexParserTest.verify_fnmatch