Updated some cookbook titles to match the usual format

Author: richardmiller-zz

cookbook/doctrine/event_listeners_subscribers.rst

@@ -3,8 +3,8 @@
 
 .. _doctrine-event-config:
 
-Registering Event Listeners and Subscribers
-===========================================
+How to Register Event Listeners and Subscribers
+===============================================
 
 Doctrine packages a rich event system that fires events when almost anything
 happens inside the system. For you, this means that you can create arbitrary
@@ -114,4 +114,4 @@ specific type of entity (e.g. a ``Product`` entity but not a ``BlogPost``
 entity), you should check for the class name of the entity in your method
 (as shown above).
 
-.. _`The Event System`: http://docs.doctrine-project.org/projects/doctrine-orm/en/2.1/reference/events.html
+.. _`The Event System`: http://docs.doctrine-project.org/projects/doctrine-orm/en/2.1/reference/events.html

cookbook/routing/method_parameters.rst

@@ -1,8 +1,8 @@
 .. index::
    single: Routing; _method
 
-Using HTTP Methods beyond GET and POST in Routes
-================================================
+How to use HTTP Methods beyond GET and POST in Routes
+=====================================================
 
 The HTTP method of a request is one of the requirements that can be checked
 when seeing if it matches a route. This is introduced in the routing chapter
@@ -111,4 +111,4 @@ Likewise the delete form could be changed to look like this:
         <input type="submit" value="Delete" />
     </form>
 
-It will then match the ``blog_delete`` route.
+It will then match the ``blog_delete`` route.