Clear some spaces and fix some inconsistencies in the Zip library and system/helpers/ files
diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index d545532..66f21c1 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.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
  *