Various typos and tabs adjustments
diff --git a/system/core/Input.php b/system/core/Input.php
index 0ef8112..6f184a3 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -47,7 +47,7 @@
 	public $ip_address = FALSE;
 
 	/**
-	 * User agent strin
+	 * User agent string
 	 *
 	 * @var	string
 	 */