diff --git a/tornado/auth.py b/tornado/auth.py
index 9410c36880d52cf41f8b9ebefc07f3fb491faf53..14d9d7753ce5483c7d7fda8d0181aacc26fda2e6 100644
--- a/tornado/auth.py
+++ b/tornado/auth.py
@@ -862,7 +862,7 @@ class FacebookMixin(object):
                 self._on_get_user_info, callback, session),
             session_key=session["session_key"],
             uids=session["uid"],
-            fields="uid,first_name,last_name,name,locale,pic_square," \
+            fields="uid,first_name,last_name,name,locale,pic_square,"
                    "profile_url,username")
 
     def facebook_request(self, method, callback, **args):
diff --git a/tornado/iostream.py b/tornado/iostream.py
index e73df0deeeb9adbe82e2e5f82ffbda366876a3ae..25caf3ee6aa4b329c7b8e69d82ab94339d4b17d4 100644
--- a/tornado/iostream.py
+++ b/tornado/iostream.py
@@ -670,7 +670,6 @@ class SSLIOStream(IOStream):
                 self._ssl_connect_callback = None
                 self._run_callback(callback)
 
-
     def _handle_read(self):
         if self._ssl_accepting:
             self._do_ssl_handshake()
diff --git a/tornado/platform/twisted.py b/tornado/platform/twisted.py
index 935b6233ee61782351a3da16a9a2133c5daf8294..5513964075b9199530d4229661ef601052149ccd 100644
--- a/tornado/platform/twisted.py
+++ b/tornado/platform/twisted.py
@@ -281,7 +281,7 @@ class TornadoReactor(PosixReactorBase):
     # IOLoop.start() instead of Reactor.run().
     def stop(self):
         PosixReactorBase.stop(self)
-        fire_shutdown = functools.partial(self.fireSystemEvent,"shutdown")
+        fire_shutdown = functools.partial(self.fireSystemEvent, "shutdown")
         self._io_loop.add_callback(fire_shutdown)
 
     def crash(self):
diff --git a/tornado/stack_context.py b/tornado/stack_context.py
index afce681ba061d81cbb6967277f04d216e5b90a75..e70fe53d8b3d148649ee1453935b35bd48622158 100644
--- a/tornado/stack_context.py
+++ b/tornado/stack_context.py
@@ -197,7 +197,7 @@ def wrap(fn):
 
     def wrapped(*args, **kwargs):
         callback, contexts, args = args[0], args[1], args[2:]
-        
+
         if contexts is _state.contexts or not contexts:
             callback(*args, **kwargs)
             return
diff --git a/tornado/test/httpserver_test.py b/tornado/test/httpserver_test.py
index e9078da2801d7492f7b2f51e8ce15543d6bc8184..190f1abc3bbd5a777eb16f10fb9aa2396514f423 100644
--- a/tornado/test/httpserver_test.py
+++ b/tornado/test/httpserver_test.py
@@ -56,7 +56,7 @@ class BaseSSLTest(AsyncHTTPSTestCase, LogTrapTestCase):
 
 class SSLTestMixin(object):
     def get_ssl_options(self):
-        return dict(ssl_version = self.get_ssl_version(),
+        return dict(ssl_version=self.get_ssl_version(),
                     **AsyncHTTPSTestCase.get_ssl_options())
 
     def get_ssl_version(self):
diff --git a/tornado/test/iostream_test.py b/tornado/test/iostream_test.py
index e58d0f77ecaf35ee47d134691f6378d99aae9011..3b051d34e8233af58aacc988bb60cf16bcb3fad0 100644
--- a/tornado/test/iostream_test.py
+++ b/tornado/test/iostream_test.py
@@ -79,6 +79,7 @@ class TestIOStreamWebMixin(object):
     def test_write_while_connecting(self):
         stream = self._make_client_iostream()
         connected = [False]
+
         def connected_callback():
             connected[0] = True
             self.stop()
@@ -87,6 +88,7 @@ class TestIOStreamWebMixin(object):
         # unlike the previous tests, try to write before the connection
         # is complete.
         written = [False]
+
         def write_callback():
             written[0] = True
             self.stop()
@@ -111,7 +113,7 @@ class TestIOStreamMixin(object):
     def _make_server_iostream(self, connection, **kwargs):
         raise NotImplementedError()
 
-    def _make_client_iostream(self, connection ,**kwargs):
+    def _make_client_iostream(self, connection, **kwargs):
         raise NotImplementedError()
 
     def make_iostream_pair(self, **kwargs):
@@ -346,16 +348,19 @@ class TestIOStreamMixin(object):
             server.close()
             client.close()
 
+
 class TestIOStreamWebHTTP(TestIOStreamWebMixin, AsyncHTTPTestCase,
                           LogTrapTestCase):
     def _make_client_iostream(self):
         return IOStream(socket.socket(), io_loop=self.io_loop)
 
+
 class TestIOStreamWebHTTPS(TestIOStreamWebMixin, AsyncHTTPSTestCase,
                            LogTrapTestCase):
     def _make_client_iostream(self):
         return SSLIOStream(socket.socket(), io_loop=self.io_loop)
 
+
 class TestIOStream(TestIOStreamMixin, AsyncTestCase, LogTrapTestCase):
     def _make_server_iostream(self, connection, **kwargs):
         return IOStream(connection, io_loop=self.io_loop, **kwargs)
@@ -363,6 +368,7 @@ class TestIOStream(TestIOStreamMixin, AsyncTestCase, LogTrapTestCase):
     def _make_client_iostream(self, connection, **kwargs):
         return IOStream(connection, io_loop=self.io_loop, **kwargs)
 
+
 class TestIOStreamSSL(TestIOStreamMixin, AsyncTestCase, LogTrapTestCase):
     def _make_server_iostream(self, connection, **kwargs):
         ssl_options = dict(
diff --git a/tornado/test/locale_test.py b/tornado/test/locale_test.py
index 333fa05d95bb5cd75672796c8a7a6eb890166079..586080b1e31dceba396bb0239c4d3e6ba347827d 100644
--- a/tornado/test/locale_test.py
+++ b/tornado/test/locale_test.py
@@ -4,6 +4,7 @@ import os
 import tornado.locale
 import unittest
 
+
 class TranslationLoaderTest(unittest.TestCase):
     # TODO: less hacky way to get isolated tests
     SAVE_VARS = ['_translations', '_supported_locales', '_use_gettext']
diff --git a/tornado/test/options_test.py b/tornado/test/options_test.py
index f792329df563845d7915c47fdee323ec30c984c3..29ce177ff7e799b06c66bda99c48f84cec3c86b3 100644
--- a/tornado/test/options_test.py
+++ b/tornado/test/options_test.py
@@ -11,6 +11,7 @@ from tornado.escape import utf8
 from tornado.options import _Options, _LogFormatter
 from tornado.util import b, bytes_type
 
+
 @contextlib.contextmanager
 def ignore_bytes_warning():
     if not hasattr(warnings, 'catch_warnings'):
diff --git a/tornado/test/runtests.py b/tornado/test/runtests.py
index a7a73e1ff986f092ee887aebcecc62aad246d045..eea052ea1cb9d4687ecb063408fc519c8622c5e3 100644
--- a/tornado/test/runtests.py
+++ b/tornado/test/runtests.py
@@ -55,7 +55,7 @@ if __name__ == '__main__':
 
     import tornado.testing
     kwargs = {}
-    if sys.version_info >= (3,2):
+    if sys.version_info >= (3, 2):
         # HACK:  unittest.main will make its own changes to the warning
         # configuration, which may conflict with the settings above
         # or command-line flags like -bb.  Passing warnings=False
diff --git a/tornado/test/twisted_test.py b/tornado/test/twisted_test.py
index 1a454817f36b98cc71466284493bff2a7be39484..2ebbb8945b34c3bb4d34e4759017b2741479256a 100644
--- a/tornado/test/twisted_test.py
+++ b/tornado/test/twisted_test.py
@@ -230,6 +230,7 @@ class Writer(object):
 if have_twisted:
     Writer = implementer(IWriteDescriptor)(Writer)
 
+
 class ReactorReaderWriterTest(ReactorTestCase):
     def _set_nonblocking(self, fd):
         flags = fcntl.fcntl(fd, fcntl.F_GETFL)
diff --git a/tornado/test/wsgi_test.py b/tornado/test/wsgi_test.py
index c3a8cfefc7bbc93f01b58ac8696c640a09f6f740..568bb116ebf0db263de139e767f18adc1e648bea 100644
--- a/tornado/test/wsgi_test.py
+++ b/tornado/test/wsgi_test.py
@@ -73,6 +73,7 @@ class WSGIConnectionTest(HTTPConnectionTest):
     def get_app(self):
         return WSGIContainer(validator(WSGIApplication(self.get_handlers())))
 
+
 class WSGIWebTest(WSGISafeWebTest):
     def get_app(self):
         self.app = WSGIApplication(self.get_handlers(), **self.get_app_kwargs())
diff --git a/tornado/testing.py b/tornado/testing.py
index 42fec8e722867fff57943bab68c618b245dd2e6a..c18f17be30c01dc872969476aeac2ea9ebb3b193 100644
--- a/tornado/testing.py
+++ b/tornado/testing.py
@@ -247,7 +247,6 @@ class AsyncHTTPTestCase(AsyncTestCase):
         return HTTPServer(self._app, io_loop=self.io_loop,
                           **self.get_httpserver_options())
 
-
     def get_app(self):
         """Should be overridden by subclasses to return a
         tornado.web.Application or other HTTPServer callback.
diff --git a/tornado/web.py b/tornado/web.py
index f7eda1f581dfedd1afd279950e0fa250f14f8a49..4d5e632e71b387bf73cae2a941556d734b978cee 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -1577,7 +1577,7 @@ class StaticFileHandler(RequestHandler):
         cache_time = self.get_cache_time(path, modified, mime_type)
 
         if cache_time > 0:
-            self.set_header("Expires", datetime.datetime.utcnow() + \
+            self.set_header("Expires", datetime.datetime.utcnow() +
                                        datetime.timedelta(seconds=cache_time))
             self.set_header("Cache-Control", "max-age=" + str(cache_time))
         else: