Merge pull request #3971 from kaleidoscopique/patch-1

Fix "$cache::save()" return type in the documentation

user_guide_src/source/libraries/caching.rst

@@ -100,7 +100,7 @@ Class Reference
 	:param	int	$ttl: Time To Live, in seconds (default 60)
 	:param	bool	$raw: Whether to store the raw value
 	:returns:	TRUE on success, FALSE on failure
-	:rtype:	string
+	:rtype:	bool
 
 	This method will save an item to the cache store. If saving fails, the
 	method will return FALSE.