minor #5799 make file path consitent with other articles (OskarStark)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #5799).

Discussion
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make file path consitent with other articles

added ``src/`` to the beginning of the file path

Greetings from Symfony Live Berlin 2015 - Hack Day 😄

Commits
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1615efd make file path consitent with other articles

Author: xabbuh

book/forms.rst

@@ -354,7 +354,7 @@ object.
 
     .. code-block:: php-annotations
 
-        // AppBundle/Entity/Task.php
+        // src/AppBundle/Entity/Task.php
         use Symfony\Component\Validator\Constraints as Assert;
 
         class Task
@@ -373,7 +373,7 @@ object.
 
     .. code-block:: yaml
 
-        # AppBundle/Resources/config/validation.yml
+        # src/AppBundle/Resources/config/validation.yml
         AppBundle\Entity\Task:
             properties:
                 task:
@@ -384,7 +384,7 @@ object.
 
     .. code-block:: xml
 
-        <!-- AppBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8"?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -404,7 +404,7 @@ object.
 
     .. code-block:: php
 
-        // AppBundle/Entity/Task.php
+        // src/AppBundle/Entity/Task.php
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints\NotBlank;
         use Symfony\Component\Validator\Constraints\Type;

book/validation.rst

@@ -532,7 +532,7 @@ class to have at least 3 characters.
 
     .. code-block:: php-annotations
 
-        // AppBundle/Entity/Author.php
+        // src/AppBundle/Entity/Author.php
 
         // ...
         use Symfony\Component\Validator\Constraints as Assert;

reference/constraints/UniqueEntity.rst

@@ -32,7 +32,7 @@ your user table:
 
     .. code-block:: php-annotations
 
-        // AppBundle/Entity/Author.php
+        // src/AppBundle/Entity/Author.php
         namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
@@ -88,8 +88,7 @@ your user table:
 
     .. code-block:: php
 
-
-        // AppBundle/Entity/User.php
+        // src/AppBundle/Entity/User.php
         namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;