backed out 648b42a75739, which was a NON-trivial whitespace commit.  It broke the Typography class's string replacements, for instance
diff --git a/system/database/drivers/mysql/mysql_forge.php b/system/database/drivers/mysql/mysql_forge.php
index 5328a7b..529ec98 100644
--- a/system/database/drivers/mysql/mysql_forge.php
+++ b/system/database/drivers/mysql/mysql_forge.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
@@ -86,7 +86,7 @@
 
 				if (array_key_exists('TYPE', $attributes))
 				{
-					$sql .= ' '.$attributes['TYPE'];
+					$sql .=  ' '.$attributes['TYPE'];
 
 					if (array_key_exists('CONSTRAINT', $attributes))
 					{