Fix the flake8 per-file ignore syntax (#5688)

.flake8

@@ -6,16 +6,17 @@ ignore = W503
 exclude =
     docs/conf.py
 
+per-file-ignores =
 # Exclude files that are meant to provide top-level imports
 # E402: Module level import not at top of file
 # F401: Module imported but unused
-    scrapy/__init__.py E402
-    scrapy/core/downloader/handlers/http.py F401
-    scrapy/http/__init__.py F401
-    scrapy/linkextractors/__init__.py E402 F401
-    scrapy/selector/__init__.py F401
-    scrapy/spiders/__init__.py E402 F401
+    scrapy/__init__.py:E402
+    scrapy/core/downloader/handlers/http.py:F401
+    scrapy/http/__init__.py:F401
+    scrapy/linkextractors/__init__.py:E402,F401
+    scrapy/selector/__init__.py:F401
+    scrapy/spiders/__init__.py:E402,F401
 
     # Issues pending a review:
-    scrapy/utils/url.py F403 F405
-    tests/test_loader.py E741
+    scrapy/utils/url.py:F403,F405
+    tests/test_loader.py:E741

scrapy/utils/url.py

@@ -34,6 +34,7 @@ def url_has_any_extension(url, extensions):
     lowercase_path = parse_url(url).path.lower()
     return any(lowercase_path.endswith(ext) for ext in extensions)
 
+
 def parse_url(url, encoding=None):
     """Return urlparsed url from the given argument (which could be an already
     parsed url)

tests/test_loader.py

@@ -295,7 +295,7 @@ class SelectortemLoaderTest(unittest.TestCase):
 
         l.add_css('name', 'div::text')
         self.assertEqual(l.get_output_value('name'), ['Marta'])
-    
+
     def test_init_method_with_base_response(self):
         """Selector should be None after initialization"""
         response = Response("https://scrapy.org")