Use Python 3 style super (#8777)

This is one of the things that newer versions of `pylint` complains about.

* git grep -l super\( | xargs sed -i 's/super([^)]*)/super()/g'

* fix spacing

certbot-dns-digitalocean/certbot_dns_digitalocean/_internal/dns_digitalocean.py

@@ -26,12 +26,12 @@ class Authenticator(dns_common.DNSAuthenticator):
     ttl = 30
 
     def __init__(self, *args, **kwargs):
-        super(Authenticator, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.credentials: Optional[CredentialsConfiguration] = None
 
     @classmethod
     def add_parser_arguments(cls, add):  # pylint: disable=arguments-differ
-        super(Authenticator, cls).add_parser_arguments(add)
+        super().add_parser_arguments(add)
         add('credentials', help='DigitalOcean credentials INI file.')
 
     def more_info(self):  # pylint: disable=missing-function-docstring

certbot-dns-digitalocean/tests/dns_digitalocean_test.py

@@ -23,7 +23,7 @@ class AuthenticatorTest(test_util.TempDirTestCase, dns_test_common.BaseAuthentic
     def setUp(self):
         from certbot_dns_digitalocean._internal.dns_digitalocean import Authenticator
 
-        super(AuthenticatorTest, self).setUp()
+        super().setUp()
 
         path = os.path.join(self.tempdir, 'file.ini')
         dns_test_common.write({"digitalocean_token": TOKEN}, path)