Fix some YAML codes

Author: Ahmed TAILOULOUTE

deployment/fortrabbit.rst

@@ -122,16 +122,16 @@ Make sure this file is imported into the main config file:
     .. code-block:: yaml
 
         # app/config/config_prod.yml
-            imports:
-                - { resource: config.yml }
-                - { resource: config_prod_secrets.php }
-
-            # ..
-            framework:
-                session:
-                    # set handler_id to null to use default session handler from php.ini (memcached)
-                    handler_id:  ~
-            # ..
+        imports:
+            - { resource: config.yml }
+            - { resource: config_prod_secrets.php }
+
+        # ..
+        framework:
+            session:
+                # set handler_id to null to use default session handler from php.ini (memcached)
+                handler_id:  ~
+        # ..
 
     .. code-block:: xml
 

reference/constraints/Image.rst

@@ -179,7 +179,7 @@ following code:
     .. code-block:: yaml
 
         # src/AppBundle/Resources/config/validation.yml
-        AppBundle\Entity\Author
+        AppBundle\Entity\Author:
             properties:
                 headshot:
                     - Image:

reference/constraints/IsFalse.rst

@@ -63,7 +63,7 @@ method returns **false**:
     .. code-block:: yaml
 
         # src/AppBundle/Resources/config/validation.yml
-        AppBundle\Entity\Author
+        AppBundle\Entity\Author:
             getters:
                 stateInvalid:
                     - 'IsFalse':

service_container/synthetic_services.rst

@@ -38,7 +38,7 @@ configuration:
 
         services:
 
-            // synthetic services don't specify a class
+            # synthetic services don't specify a class
             app.synthetic_service:
                 synthetic: true