[ci skip] Normalize tabs/spaces

Partial changes from PR #4016
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 1f48c07..5de7a94 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -514,7 +514,7 @@
 	 *
 	 * Clears the cached variables.
 	 *
-	 * @return  object
+	 * @return	CI_Loader
 	 */
 	public function clear_vars()
 	{