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-cloudxns/certbot_dns_cloudxns/_internal/dns_cloudxns.py

@@ -28,12 +28,12 @@ class Authenticator(dns_common.DNSAuthenticator):
     ttl = 60
 
     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, default_propagation_seconds=30)
+        super().add_parser_arguments(add, default_propagation_seconds=30)
         add('credentials', help='CloudXNS credentials INI file.')
 
     def more_info(self):  # pylint: disable=missing-function-docstring
@@ -71,7 +71,7 @@ class _CloudXNSLexiconClient(dns_common_lexicon.LexiconClient):
     """
 
     def __init__(self, api_key, secret_key, ttl):
-        super(_CloudXNSLexiconClient, self).__init__()
+        super().__init__()
 
         config = dns_common_lexicon.build_lexicon_config('cloudxns', {
             'ttl': ttl,

certbot-dns-cloudxns/tests/dns_cloudxns_test.py

@@ -26,7 +26,7 @@ class AuthenticatorTest(test_util.TempDirTestCase,
                         dns_test_common_lexicon.BaseLexiconAuthenticatorTest):
 
     def setUp(self):
-        super(AuthenticatorTest, self).setUp()
+        super().setUp()
 
         from certbot_dns_cloudxns._internal.dns_cloudxns import Authenticator