Added full docs for new ENVIRONMENT constant.
diff --git a/system/core/Config.php b/system/core/Config.php
index 75f945e..a2a7dd5 100644
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -318,4 +318,4 @@
 // END CI_Config class
 
 /* End of file Config.php */
-/* Location: ./system/core/Config.php */
\ No newline at end of file
+/* Location: ./system/core/Config.php */