Merge branch '2.3' into 2.5

* 2.3:
  Use the new build env on Travis
  required PHPUnit version in the docs should be updated to 4.2 (or later) since the atLeast() method which is used in some of the tests
  Replace form_enctype(form) with form_start(form).

Author: weaverryan

.travis.yml

@@ -3,6 +3,8 @@ language: python
 python:
     - "2.7"
 
+sudo: false
+
 install: 
     - "pip install -q -r requirements.txt --use-mirrors"
 

best_practices/forms.rst

@@ -139,12 +139,12 @@ view layer:
 
 .. code-block:: html+jinja
 
-    <form method="POST" {{ form_enctype(form) }}>
+    {{ form_start(form) }}
         {{ form_widget(form) }}
 
         <input type="submit" value="Create"
                class="btn btn-default pull-right" />
-    </form>
+    {{ form_end(form) }}
 
 Rendering the Form
 ------------------

contributing/code/tests.rst

@@ -9,7 +9,7 @@ Symfony test suite to check that you have not broken anything.
 PHPUnit
 -------
 
-To run the Symfony test suite, `install PHPUnit`_ 3.7 (or later) first.
+To run the Symfony test suite, `install PHPUnit`_ 4.2 (or later) first.
 
 Dependencies (optional)
 -----------------------