Removed closing PHP tags, replaced with a comment block identifying the end of the file
diff --git a/system/libraries/Calendar.php b/system/libraries/Calendar.php
index e9621fe..fbb275c 100644
--- a/system/libraries/Calendar.php
+++ b/system/libraries/Calendar.php
@@ -472,4 +472,6 @@
 }

 

 // END CI_Calendar class

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