Update coding style after pycodestyle 2.1.0

In pycodestyle 2.1.0, E305 was introduced, which requires two blank
lines after top level declarations, too.

See https://github.com/PyCQA/pycodestyle/issues/400

See also #10689; thanks @stepshal for first mentioning this issue and
initial patches

test/test_InfoExtractor.py

@@ -84,5 +84,6 @@ class TestInfoExtractor(unittest.TestCase):
         self.assertRaises(ExtractorError, self.ie._download_json, uri, None)
         self.assertEqual(self.ie._download_json(uri, None, fatal=False), None)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_aes.py

@@ -51,5 +51,6 @@ class TestAES(unittest.TestCase):
         decrypted = (aes_decrypt_text(encrypted, password, 32))
         self.assertEqual(decrypted, self.secret_msg)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_download.py

@@ -60,6 +60,7 @@ def _file_md5(fn):
     with open(fn, 'rb') as f:
         return hashlib.md5(f.read()).hexdigest()
 
+
 defs = gettestcases()
 
 
@@ -217,6 +218,7 @@ def generator(test_case):
 
     return test_template
 
+
 # And add them to TestDownload
 for n, test_case in enumerate(defs):
     test_method = generator(test_case)

test/test_execution.py

@@ -39,5 +39,6 @@ class TestExecution(unittest.TestCase):
         _, stderr = p.communicate()
         self.assertFalse(stderr)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_http.py

@@ -169,5 +169,6 @@ class TestProxy(unittest.TestCase):
         # b'xn--fiq228c' is '中文'.encode('idna')
         self.assertEqual(response, 'normal: http://xn--fiq228c.tw/')
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_iqiyi_sdk_interpreter.py

@@ -43,5 +43,6 @@ class TestIqiyiSDKInterpreter(unittest.TestCase):
         ie._login()
         self.assertTrue('unable to log in:' in logger.messages[0])
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_jsinterp.py

@@ -112,5 +112,6 @@ class TestJSInterpreter(unittest.TestCase):
         ''')
         self.assertEqual(jsi.call_function('z'), 5)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_utils.py

@@ -1075,5 +1075,6 @@ The first line
         self.assertEqual(get_element_by_class('foo', html), 'nice')
         self.assertEqual(get_element_by_class('no-such-class', html), None)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_verbose_output.py

@@ -66,5 +66,6 @@ class TestVerboseOutput(unittest.TestCase):
         self.assertTrue(b'-p' in serr)
         self.assertTrue(b'secret' not in serr)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_write_annotations.py

@@ -24,6 +24,7 @@ class YoutubeDL(youtube_dl.YoutubeDL):
         super(YoutubeDL, self).__init__(*args, **kwargs)
         self.to_stderr = self.to_screen
 
+
 params = get_params({
     'writeannotations': True,
     'skip_download': True,
@@ -74,5 +75,6 @@ class TestAnnotations(unittest.TestCase):
     def tearDown(self):
         try_rm(ANNOTATIONS_FILE)
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_youtube_lists.py

@@ -66,5 +66,6 @@ class TestYoutubeLists(unittest.TestCase):
         for entry in result['entries']:
             self.assertTrue(entry.get('title'))
 
+
 if __name__ == '__main__':
     unittest.main()

test/test_youtube_signature.py

@@ -114,6 +114,7 @@ def make_tfunc(url, stype, sig_input, expected_sig):
     test_func.__name__ = str('test_signature_' + stype + '_' + test_id)
     setattr(TestSignature, test_func.__name__, test_func)
 
+
 for test_spec in _TESTS:
     make_tfunc(*test_spec)