Updating singleton examples

docs/providers/singleton.rst

@@ -21,7 +21,6 @@ Example:
 
         """Example class UserService."""
 
-
     # Singleton provider creates new instance of specified class on first call and
     # returns same instance on every next call.
     users_service_provider = Singleton(UserService)
@@ -35,7 +34,6 @@ Example:
     assert isinstance(user_service1, UserService)
     assert isinstance(user_service2, UserService)
 
-
 Singleton providers and injections
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -84,7 +82,6 @@ Example:
 
         """Example class UserService."""
 
-
     # Users service singleton provider:
     users_service_provider = Singleton(UserService)
 
@@ -105,4 +102,3 @@ Example:
 
     # Making some asserts:
     assert user_service3 is not user_service1
-

examples/providers/singleton.py

@@ -7,7 +7,6 @@ class UserService(object):
 
     """Example class UserService."""
 
-
 # Singleton provider creates new instance of specified class on first call and
 # returns same instance on every next call.
 users_service_provider = Singleton(UserService)

examples/providers/singleton_reseting.py

@@ -7,7 +7,6 @@ class UserService(object):
 
     """Example class UserService."""
 
-
 # Users service singleton provider:
 users_service_provider = Singleton(UserService)