backed out 648b42a75739, which was a NON-trivial whitespace commit.  It broke the Typography class's string replacements, for instance
diff --git a/system/core/Exceptions.php b/system/core/Exceptions.php
index 2503c90..bff86a9 100644
--- a/system/core/Exceptions.php
+++ b/system/core/Exceptions.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
  *
@@ -54,7 +54,7 @@
 	public function __construct()
 	{
 		$this->ob_level = ob_get_level();
-		// Note: Do not log messages from this constructor.
+		// Note:  Do not log messages from this constructor.
 	}
 
 	// --------------------------------------------------------------------
@@ -75,7 +75,7 @@
 	{
 		$severity = ( ! isset($this->levels[$severity])) ? $severity : $this->levels[$severity];
 
-		log_message('error', 'Severity: '.$severity.' --> '.$message. ' '.$filepath.' '.$line, TRUE);
+		log_message('error', 'Severity: '.$severity.'  --> '.$message. ' '.$filepath.' '.$line, TRUE);
 	}
 
 	// --------------------------------------------------------------------