commit c400ee507fb2c8a3cade4b9443514ea8d4824711
Author: Joel Pittet <joel@pittet.ca>
Date:   Fri Aug 1 08:59:50 2014 -0700

    cleanup debug messages

diff --git a/core/lib/Drupal/Core/Template/Attribute.php b/core/lib/Drupal/Core/Template/Attribute.php
index f107926..00b3142 100644
--- a/core/lib/Drupal/Core/Template/Attribute.php
+++ b/core/lib/Drupal/Core/Template/Attribute.php
@@ -131,8 +131,6 @@ public function addClass() {
       // values or one or more array arguments.
       $classes = array_merge($classes, (array) $arg);
     }
-    // var_dump($classes);
-
     // Merge if there are values, just add them otherwise.
     if (isset($this->storage['class']) && $this->storage['class'] instanceOf AttributeArray) {
       // Merge the values passed in from the class value array.
@@ -147,7 +145,6 @@ public function addClass() {
       $this->offsetSet('class', $classes);
     }
 
-    // var_dump($this->storage['class']);
     return $this;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
index b73321e..c09d3e0 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
@@ -65,10 +65,8 @@ public function testAddClasses() {
 
     // Add empty Attribute object with no classes.
     $attribute = new Attribute();
-    // Add one class.
+    // Add one class on empty attribute.
     $attribute->addClass('banana');
-
-    var_dump($attribute);
     $this->assertEquals(new AttributeArray('class', array('banana')), $attribute['class']);
 
     // Add one class.
@@ -77,22 +75,11 @@ public function testAddClasses() {
 
     // Add multiple classes.
     $attribute->addClass('xx', 'yy');
-    $this->assertEquals(
-      new AttributeArray(
-        'class',
-        array('banana', 'aa', 'xx', 'yy')),
-      $attribute['class']
-    );
+    $this->assertEquals(new AttributeArray('class', array('banana', 'aa', 'xx', 'yy')), $attribute['class']);
 
     // Add an array of classes.
     $attribute->addClass(array('red', 'green', 'blue'));
-    $this->assertEquals(
-      new AttributeArray(
-        'class',
-        array('banana', 'aa', 'xx', 'yy', 'red', 'green', 'blue')
-      ),
-      $attribute['class']
-    );
+    $this->assertEquals(new AttributeArray('class', array('banana', 'aa', 'xx', 'yy', 'red', 'green', 'blue')), $attribute['class']);
   }
 
   /**