Bump version number for 3.4.2rc1 release.
diff --git a/Lib/idlelib/idlever.py b/Lib/idlelib/idlever.py
index 22acb41..3f42fda 100644
--- a/Lib/idlelib/idlever.py
+++ b/Lib/idlelib/idlever.py
@@ -1 +1 @@
-IDLE_VERSION = "3.4.1"
+IDLE_VERSION = "3.4.2rc1"