Replaced spaces with tabs for indentation and || with OR
diff --git a/system/core/Security.php b/system/core/Security.php
index 8c70e85..5ae8e65 100644
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -526,17 +526,17 @@
 			$charset = config_item('charset');
 		}
 
-                do
-                {
-                    $matches = $matches1 = 0;
+		do
+		{
+			$matches = $matches1 = 0;
 
-                    $str = html_entity_decode($str, ENT_COMPAT, $charset);
-                    $str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str, -1, $matches);
-                    $str = preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str, -1, $matches1);
-                }
-                while($matches || $matches1);
+			$str = html_entity_decode($str, ENT_COMPAT, $charset);
+			$str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str, -1, $matches);
+			$str = preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str, -1, $matches1);
+		}
+		while($matches OR $matches1);
 
-                return $str;
+		return $str;
 	}
 
 	// --------------------------------------------------------------------