Two minor pep8 changes

abstract_factory.py

@@ -14,7 +14,6 @@ class PetShop:
 
         self.pet_factory = animal_factory
 
-
     def show_pet(self):
         """Creates and shows a pet using the
         abstract factory"""
@@ -73,4 +72,4 @@ if __name__ == "__main__":
     for i in range(3):
         shop.pet_factory = get_factory()
         shop.show_pet()
-        print("=" * 20)
+        print("=" * 20)

chain.py

@@ -5,6 +5,7 @@ class Handler:
     def successor(self, successor):
         self.successor = successor
 
+
 class ConcreteHandler1(Handler):
     def handle(self, request):
         if 0 < request <= 10: