Clean up the libraries
diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php
index ec41952..f0eb8bd 100644
--- a/system/libraries/Cache/drivers/Cache_file.php
+++ b/system/libraries/Cache/drivers/Cache_file.php
@@ -45,6 +45,8 @@
 
 	/**
 	 * Initialize file-based cache
+	 *
+	 * @return	void
 	 */
 	public function __construct()
 	{
diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php
index 813df4b..1df149c 100644
--- a/system/libraries/Cache/drivers/Cache_memcached.php
+++ b/system/libraries/Cache/drivers/Cache_memcached.php
@@ -77,7 +77,7 @@
 	 * @param	string	unique identifier
 	 * @param	mixed	data being cached
 	 * @param	int	time to live
-	 * @return	bool true on success, false on failure
+	 * @return	bool	true on success, false on failure
 	 */
 	public function save($id, $data, $ttl = 60)
 	{
@@ -99,7 +99,7 @@
 	 * Delete from Cache
 	 *
 	 * @param	mixed	key to be deleted.
-	 * @return	bool true on success, false on failure
+	 * @return	bool	true on success, false on failure
 	 */
 	public function delete($id)
 	{