backed out 648b42a75739, which was a NON-trivial whitespace commit.  It broke the Typography class's string replacements, for instance
diff --git a/application/config/hooks.php b/application/config/hooks.php
index 4b26665..a4ad2be 100644
--- a/application/config/hooks.php
+++ b/application/config/hooks.php
@@ -1,10 +1,10 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /*
 | -------------------------------------------------------------------------
 | Hooks
 | -------------------------------------------------------------------------
 | This file lets you define "hooks" to extend CI without hacking the core
-| files. Please see the user guide for info:
+| files.  Please see the user guide for info:
 |
 |	http://codeigniter.com/user_guide/general/hooks.html
 |