fix wording : instantiate "class", not instantiate "object"

book/service_container.rst

@@ -670,7 +670,7 @@ Using references is a very powerful tool that allows you to create independent s
 classes with well-defined dependencies. In this example, the ``newsletter_manager``
 service needs the ``my_mailer`` service in order to function. When you define
 this dependency in the service container, the container takes care of all
-the work of instantiating the objects.
+the work of instantiating the classes.
 
 Optional Dependencies: Setter Injection
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

components/dependency_injection/factories.rst

@@ -10,7 +10,7 @@ as well as calling methods and setting parameters. Sometimes, however, this
 will not provide you with everything you need to construct your objects.
 For this situation, you can use a factory to create the object and tell the
 service container to call a method on the factory rather than directly instantiating
-the object.
+the class.
 
 Suppose you have a factory that configures and returns a new NewsletterManager
 object::

cookbook/form/use_empty_data.rst

@@ -61,7 +61,7 @@ that constructor with no arguments::
 
 You can instantiate your class however you want. In this example, we pass
 some dependency into the ``BlogType`` when we instantiate it, then use that
-to instantiate the ``Blog`` object. The point is, you can set ``empty_data``
+to instantiate the ``Blog`` class. The point is, you can set ``empty_data``
 to the exact "new" object that you want to use.
 
 Option 2: Provide a Closure