add callable as reserved word

diff --git a/UPGRADING b/UPGRADING
index 17f630a0cd2636ab30edf7c0bf745f94017f81f2..cbd125dbdf25cefba0da6cbb3557e049fd54d0ec 100755 (executable)
--- a/UPGRADING
+++ b/UPGRADING
@@ -80,7 +80,7 @@ UPGRADE NOTES - PHP 5.4
 2. Reserved words and classes
 =============================
 
-- "trait" and "insteadof" are reserved words now.
+- "callable", "insteadof" and "trait" are reserved words now.
 
 ===================================
 3. Changes made to engine behaviour