Removed closing PHP tags, replaced with a comment block identifying the end of the file
diff --git a/system/libraries/Output.php b/system/libraries/Output.php
index d513a12..f76550e 100644
--- a/system/libraries/Output.php
+++ b/system/libraries/Output.php
@@ -383,4 +383,6 @@
 

 }

 // END Output Class

-?>
\ No newline at end of file
+
+/* End of file Output.php */
+/* Location: ./system/libraries/Output.php */
\ No newline at end of file