updated CHANGELOG

CHANGELOG

@@ -1,5 +1,6 @@
 * 2.0.0 (201X-XX-XX)
 
+ * made the loader a required argument of Twig_Environment constructor
  * removed Twig_Environment::clearTemplateCache()
  * removed Twig_Autoloader (use Composer instead)
  * removed `true` as an equivalent to `html` for the auto-escaping strategy

doc/recipes.rst

@@ -103,7 +103,7 @@ syntax. But for specific projects, it can make sense to change the defaults.
 
 To change the block delimiters, you need to create your own lexer object::
 
-    $twig = new Twig_Environment();
+    $twig = new Twig_Environment(...);
 
     $lexer = new Twig_Lexer($twig, array(
         'tag_comment'   => array('{#', '#}'),