bug #3544 Fix build errors (xabbuh)

This PR was merged into the master branch.

Discussion
----------

Fix build errors

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.5
| Fixed tickets |

Commits
-------

46e0b52 remove empty_data from the list of inherited options, it's documented in the overriden options section
7e3c0e3 readd configuration block
64602c8 fix referenced documents names

Author: weaverryan

book/security.rst

@@ -1437,7 +1437,7 @@ is available by calling the PHP function :phpfunction:`hash_algos`.
 .. tip::
 
     It's also possible to use different hashing algorithms on a user-by-user
-    basis. See :doc:`/cookbook/security/named-encoders` for more details.
+    basis. See :doc:`/cookbook/security/named_encoders` for more details.
 
 Determining the Hashed Password
 ...............................

cookbook/security/named_encoders.rst

@@ -10,6 +10,10 @@ How to Choose the Password Encoder Algorithm Dynamically
 Usually, the same password encoder is used for all users by configuring it
 to apply to all instances of a specific class:
 
+.. configuration-block::
+
+    .. code-block:: yaml
+
         # app/config/security.yml
         security:
             # ...
@@ -117,7 +121,7 @@ the name of the encoder to use::
             if ($this->isAdmin()) {
                 return 'harsh';
             }
-            
+
             return null; // use the default encoder
         }
     }

reference/forms/types/checkbox.rst

@@ -60,8 +60,6 @@ These options inherit from the :doc:`form </reference/forms/types/form>` type:
 
 .. include:: /reference/forms/types/options/data.rst.inc
 
-.. include:: /reference/forms/types/options/empty_data.rst.inc
-
 .. include:: /reference/forms/types/options/required.rst.inc
 
 .. include:: /reference/forms/types/options/label.rst.inc

reference/forms/types/collection.rst

@@ -379,4 +379,4 @@ error_bubbling
 
 .. include:: /reference/forms/types/options/mapped.rst.inc
 
-.. include:: /reference/forms/type/options/cascade_validation.rst.inc
+.. include:: /reference/forms/types/options/cascade_validation.rst.inc

reference/forms/types/options/checkbox_empty_data.rst.inc

@@ -6,4 +6,4 @@ empty_data
 This option determines what value the field will return when the ``empty_value``
 choice is selected.
 In checkbox, the value of ``empty_data`` is overriden by the value returned by
-the data transformer (see :doc:`/cookbook/form/data_transformers.rst`).
+the data transformer (see :doc:`/cookbook/form/data_transformers`).