lint: Clean up E306 PEP-8 rule.

api/zulip/__init__.py

@@ -423,6 +423,7 @@ class Client(object):
         # type: (Callable, Optional[List[str]], Any) -> None
         if narrow is None:
             narrow = []
+
         def do_register():
             # type: () -> Tuple[str, int]
             while True:

contrib_bots/bots/converter/tests.py

@@ -4,9 +4,11 @@ def test():
     for cmd, expected_response in sample_conversation():
         message = {'content': cmd, 'subject': 'foo',
                    'display_recipient': 'bar'}
+
         class ClientDummy(object):
             def __init__(self):
                 self.output = ''
+
             def send_message(self, params):
                 self.output = params['content']
         handler = converter.ConverterHandler()

tools/lint-all

@@ -88,7 +88,7 @@ def check_pep8(files):
         # actually be cleaned up.
         #
         'E123', 'E126', 'E226', 'E241', 'E261', 'E302',
-        'E306', 'E401', 'E501', 'E702', 'E711', 'E712', 'E713', 'E714',
+        'E401', 'E501', 'E702', 'E711', 'E712', 'E713', 'E714',
         'E741',
 
         #