minor #5573 fix YAML syntax highlighting (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

fix YAML syntax highlighting

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

91b93ec fix YAML syntax highlighting

Author: wouterj

cookbook/configuration/mongodb_session_storage.rst

@@ -30,12 +30,12 @@ need to change/add some parameters in the main configuration file:
             mongo_client:
                 class: MongoClient
                 # if using a username and password
-                arguments: [mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017]
+                arguments: ["mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017"]
                 # if not using a username and password
-                arguments: [mongodb://%mongodb_host%:27017]
+                arguments: ["mongodb://%mongodb_host%:27017"]
             session.handler.mongo:
                 class: Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler
-                arguments: [@mongo_client, %mongo.session.options%]
+                arguments: ["@mongo_client", "%mongo.session.options%"]
 
     .. code-block:: xml
 
@@ -168,4 +168,4 @@ From the `MongoDB shell`_:
     db.session.ensureIndex( { "expireAt": 1 }, { expireAfterSeconds: 0 } )
 
 .. _installed and configured a MongoDB server: http://docs.mongodb.org/manual/installation/
-.. _MongoDB shell: http://docs.mongodb.org/v2.2/tutorial/getting-started-with-the-mongo-shell/
+.. _MongoDB shell: http://docs.mongodb.org/v2.2/tutorial/getting-started-with-the-mongo-shell/

cookbook/logging/monolog.rst

@@ -243,7 +243,7 @@ option of your handler to ``rotating_file``:
             handlers:
                 main:
                     type:  rotating_file
-                    path:  %kernel.logs_dir%/%kernel.environment%.log
+                    path:  "%kernel.logs_dir%/%kernel.environment%.log"
                     level: debug
                     # max number of log files to keep
                     # defaults to zero, which means infinite files

cookbook/session/locale_sticky_session.rst

@@ -171,7 +171,7 @@ Then register the listener:
         services:
             app.user_locale_listener:
                 class: AppBundle\EventListener\UserLocaleListener
-                arguments: [@session]
+                arguments: ["@session"]
                 tags:
                     - { name: kernel.event_listener, event: security.interactive_login, method: onInteractiveLogin }
 

reference/configuration/doctrine.rst

@@ -601,7 +601,7 @@ namespace in the ``src/Entity`` directory and gives them an ``App`` alias
                         # ...
                         SomeEntityNamespace:
                             type: annotation
-                            dir: %kernel.root_dir%/../src/Entity
+                            dir: "%kernel.root_dir%/../src/Entity"
                             is_bundle: false
                             prefix: App\Entity
                             alias: App