Start comment cleanup of libraries
diff --git a/system/libraries/Cache/drivers/Cache_apc.php b/system/libraries/Cache/drivers/Cache_apc.php
index 59ab675..c85034f 100644
--- a/system/libraries/Cache/drivers/Cache_apc.php
+++ b/system/libraries/Cache/drivers/Cache_apc.php
@@ -75,7 +75,7 @@
* Delete from Cache
*
* @param mixed unique identifier of the item in the cache
- * @param bool true on success/false on failure
+ * @return bool true on success/false on failure
*/
public function delete($id)
{