Bumping to 2.6.4rc1
diff --git a/Lib/idlelib/idlever.py b/Lib/idlelib/idlever.py
index 0f10960..55f72c7 100644
--- a/Lib/idlelib/idlever.py
+++ b/Lib/idlelib/idlever.py
@@ -1 +1 @@
-IDLE_VERSION = "2.6.3"
+IDLE_VERSION = "2.6.4rc1"