diff --git a/sanic/app.py b/sanic/app.py
index 5d4b8d20..792b3183 100644
--- a/sanic/app.py
+++ b/sanic/app.py
@@ -12,7 +12,8 @@ from ssl import create_default_context, Purpose
 
 from sanic.config import Config, LOGGING
 from sanic.constants import HTTP_METHODS
-from sanic.exceptions import ServerError, URLBuildError, SanicException, MiddlewareTypeError
+from sanic.exceptions import ServerError, URLBuildError, SanicException,\
+     MiddlewareTypeError
 from sanic.handlers import ErrorHandler
 from sanic.log import log
 from sanic.response import HTTPResponse, StreamingHTTPResponse
@@ -136,7 +137,7 @@ class Sanic:
                             vars(handler)['_'+r+'_middleware'] = tuple(mid)
                         else:
                             raise MiddlewareTypeError(
-                                "Middleware mounted on a handler should " 
+                                "Middleware mounted on a handler should "
                                 "be a function or a sequence of functions"
                             )
 
@@ -481,8 +482,10 @@ class Sanic:
                 if hasattr(handler, "_request_middleware"):
                     mounted_request_middleware = handler._request_middleware
                     if mounted_request_middleware:
-                        response = await self._handle_mounted_request_middleware(
-                            mounted_request_middleware, request, *args, **kwargs
+                        response = \
+                        await self._handle_mounted_request_middleware(
+                            mounted_request_middleware, request,
+                            *args, **kwargs
                         )
                 # No mounted request middleware result
                 if not response:
@@ -498,11 +501,12 @@ class Sanic:
                 if hasattr(handler, "_response_middleware"):
                     mounted_response_middleware = handler._response_middleware
                     if mounted_response_middleware:
-                        response = await self._handle_mounted_response_middleware(
-                            mounted_response_middleware, request, response, *args, **kwargs
+                        response = \
+                        await self._handle_mounted_response_middleware(
+                            mounted_response_middleware, request, response,
+                            *args, **kwargs
                         )
 
-
         except Exception as e:
             # -------------------------------------------- #
             # Response Generation Failed
@@ -658,7 +662,8 @@ class Sanic:
                     break
         return response
 
-    async def _handle_mounted_request_middleware(self, middleware, request, *args, **kwargs):
+    async def _handle_mounted_request_middleware(self, middleware, request,
+                                                 *args, **kwargs):
         for mid in middleware:
             response = mid(request, *args, **kwargs)
             if isawaitable(response):
@@ -667,7 +672,8 @@ class Sanic:
                 break
         return response
 
-    async def _handle_mounted_response_middleware(self, middleware, request, response, *args, **kwargs):
+    async def _handle_mounted_response_middleware(self, middleware, request,
+                                                  response, *args, **kwargs):
         for mid in middleware:
             _response = mid(request, response, *args, **kwargs)
             if isawaitable(_response):
@@ -677,7 +683,6 @@ class Sanic:
                 break
         return response
 
-
     def _helper(self, host="127.0.0.1", port=8000, debug=False,
                 ssl=None, sock=None, workers=1, loop=None,
                 protocol=HttpProtocol, backlog=100, stop_event=None,
diff --git a/sanic/exceptions.py b/sanic/exceptions.py
index 79a522cc..a3477c71 100644
--- a/sanic/exceptions.py
+++ b/sanic/exceptions.py
@@ -175,5 +175,6 @@ class ContentRangeError(SanicException):
 class InvalidRangeType(ContentRangeError):
     pass
 
+
 class MiddlewareTypeError(Exception):
-    pass
\ No newline at end of file
+    pass