Add Auto-wiring keyword

Author: theofidry

components/dependency_injection/autowiring.rst

@@ -1,8 +1,8 @@
 .. index::
     single: DependencyInjection; Autowiring
 
-Defining Services Dependencies Automatically
-============================================
+Defining Services Dependencies Automatically (Autowiring)
+=========================================================
 
 .. versionadded:: 2.8
     Support for autowiring services was introduced in Symfony 2.8.
@@ -76,7 +76,7 @@ service is marked as autowired:
             <services>
                 <service id="twitter_client" class="AppBundle\TwitterClient" autowire="true" />
             </services>
-        </services>
+        </container>
 
     .. code-block:: php