Merge branch '2.6' into 2.7

* 2.6: (61 commits)
  Update data_collector.rst
  Updated types articles
  Improve invalid user provider exception message
  Check user provider type
  Use configured user provider instead of injection
  Reviewed form type options includes
  Update authentication.rst
  Update authentication.rst
  Remove Serial Comma
  Update validation.rst
  Improve Choice Validation Constraint Example
  Clarify `query_builder` closure return type
  Remove indentations for all-whitespace lines.
  Fix incorrect instructions regarding linking to the "full panel", improve roll-over data example.
  Flesh out twig-template for custom data-collector
  Simply moving new section down a little lower - I believe some of the other options are a bit more common (totally subjective)
  describe the allow_extra_fields form option
  another fix!
  Fixing things thanks to Wouter
  Tweaks to the new using commands in a controller article
  ...

best_practices/web-assets.rst

@@ -29,8 +29,8 @@ much more concise:
 .. note::
 
     Keep in mind that ``web/`` is a public directory and that anything stored
-    here will be publicly accessible. For that reason, you should put your
-    compiled web assets here, but not their source files (e.g. SASS files).
+    here will be publicly accessible, including all the original asset files
+    (e.g. Sass, LESS and CoffeScript files).
 
 Using Assetic
 -------------
@@ -51,16 +51,15 @@ tools like GruntJS.
 
 :doc:`Assetic </cookbook/assetic/asset_management>` is an asset manager capable
 of compiling assets developed with a lot of different frontend technologies
-like LESS, Sass and CoffeeScript.
-Combining all your assets with Assetic is a matter of wrapping all the assets
-with a single Twig tag:
+like LESS, Sass and CoffeeScript. Combining all your assets with Assetic is a
+matter of wrapping all the assets with a single Twig tag:
 
 .. code-block:: html+jinja
 
     {% stylesheets
         'css/bootstrap.min.css'
         'css/main.css'
-        filter='cssrewrite' output='css/compiled/all.css' %}
+        filter='cssrewrite' output='css/compiled/app.css' %}
         <link rel="stylesheet" href="{{ asset_url }}" />
     {% endstylesheets %}
 
@@ -69,7 +68,7 @@ with a single Twig tag:
     {% javascripts
         'js/jquery.min.js'
         'js/bootstrap.min.js'
-        output='js/compiled/all.js' %}
+        output='js/compiled/app.js' %}
         <script src="{{ asset_url }}"></script>
     {% endjavascripts %}
 

book/index.rst

@@ -21,6 +21,5 @@ The Book
     translation
     service_container
     performance
-    internals
 
 .. include:: /book/map.rst.inc