Update provider overriding docs

docs/providers/overriding.rst

@@ -5,7 +5,7 @@ Overriding of providers
 
 Every provider could be overridden by another provider.
 
-This gives opportunity to make system behaviour more flexible in some points.
+This gives opportunity to make system behaviour more flexible at some point.
 The main feature is that while your code is using providers, it depends on 
 providers, but not on the objects that providers provide. As a result of this, 
 you can change providing by provider object to a different one, but still
@@ -14,7 +14,7 @@ compatible one, without chaning your previously written code.
 Provider overriding functionality has such interface:
 
 .. image:: /images/providers/provider_override.png
-    :width: 45%
+    :width: 55%
     :align: center
 
 + :py:meth:`Provider.override()` - takes another provider that will be used 
@@ -22,16 +22,7 @@ Provider overriding functionality has such interface:
   In such case, last passed provider would be used as overriding one.
 + :py:meth:`Provider.reset_override()` - resets all overriding providers. 
   Provider starts to behave itself like usual.
-+ :py:attr:`Provider.is_overridden` - bool, ``True`` if provider is overridden.
-
-.. note::
-
-   Actually, initial provider forms stack from overriding providers. There is 
-   some, not so common, but still usefull, functionality that could be used:
-
-   + :py:attr:`Provider.last_overriding` - always keeps reference to last 
-     overriding provider.
-   + :py:meth:`Provider.reset_last_overriding()` - remove last overriding 
++ :py:meth:`Provider.reset_last_overriding()` - remove last overriding 
   provider from stack of overriding providers.
 
 Example:

examples/providers/overriding_users_model.py

@@ -13,20 +13,20 @@ class User(object):
         super(User, self).__init__()
 
 
-class UserService(object):
-    """Example class UserService."""
+class UsersService(object):
+    """Example class UsersService."""
 
     def __init__(self, user_cls):
         """Initializer."""
         self.user_cls = user_cls
-        super(UserService, self).__init__()
+        super(UsersService, self).__init__()
 
     def get_by_id(self, id):
         """Find user by his id and return user model."""
         return self.user_cls(id=id, password='secret' + str(id))
 
-# Users factory and UserService provider:
-users_service = providers.Factory(UserService, user_cls=User)
+# Users factory and UsersService provider:
+users_service = providers.Factory(UsersService, user_cls=User)
 
 # Getting several users and making some asserts:
 user1 = users_service().get_by_id(1)
@@ -58,19 +58,19 @@ class ExtendedUser(User):
         super(ExtendedUser, self).__init__(id, password)
 
 
-class ExtendedUserService(UserService):
-    """Example class ExtendedUserService."""
+class ExtendedUsersService(UsersService):
+    """Example class ExtendedUsersService."""
 
     def get_by_id(self, id):
         """Find user by his id and return user model."""
-        user = super(ExtendedUserService, self).get_by_id(id)
+        user = super(ExtendedUsersService, self).get_by_id(id)
         user.first_name = 'John' + str(id)
         user.last_name = 'Smith' + str(id)
         user.gender = 'male'
         return user
 
 # Overriding users_service provider:
-extended_users_service = providers.Factory(ExtendedUserService,
+extended_users_service = providers.Factory(ExtendedUsersService,
                                            user_cls=ExtendedUser)
 users_service.override(extended_users_service)