Method check

Lib/test/test_utf8_mode.py:227–230

(utf8_opt, expected, **kw)

        code = 'import locale, sys; print("%s:%s" % (locale.getpreferredencoding(), ascii(sys.argv[1:])))'

        def check(utf8_opt, expected, **kw):
            out = self.get_output('-X', utf8_opt, '-c', code, arg, **kw)
            args = out.partition(':')[2].rstrip()
            self.assertEqual(args, ascii(expected), out)

        check('utf8', [arg_utf8])
        for loc in POSIX_LOCALES: