optimize migrations class reference
diff --git a/system/libraries/Migration.php b/system/libraries/Migration.php
index ae36a3b..e17f416 100644
--- a/system/libraries/Migration.php
+++ b/system/libraries/Migration.php
@@ -191,7 +191,7 @@
* choice
*
* @param string $target_version Target schema version
- * @return mixed TRUE if already latest, FALSE if failed, string if upgraded
+ * @return mixed TRUE if no migrations are found, current version string on success, FALSE on failure
*/
public function version($target_version)
{
@@ -294,7 +294,7 @@
/**
* Sets the schema to the latest migration
*
- * @return mixed TRUE if already latest, FALSE if failed, string if upgraded
+ * @return mixed current version string on success, FALSE on failure
*/
public function latest()
{
@@ -318,7 +318,7 @@
/**
* Sets the schema to the migration version set in config
*
- * @return mixed TRUE if already current, FALSE if failed, string if upgraded
+ * @return mixed TRUE if no migrations are found, current version string on success, FALSE on failure
*/
public function current()
{