Add the missing __main__.py in the turtledemo package. It seems to have been lost during some mass rename action (r86095).
diff --git a/Lib/turtledemo/about_turtledemo.txt b/Lib/turtledemo/about_turtledemo.txt
index 54c25a5..a9009bd 100644
--- a/Lib/turtledemo/about_turtledemo.txt
+++ b/Lib/turtledemo/about_turtledemo.txt
@@ -1,9 +1,9 @@
--------------------------------------
- About turtleDemo.py
+ About this viewer
--------------------------------------
- Tiny demo Viewer to view turtle graphics example scripts.
+ Tiny demo viewer to view turtle graphics example scripts.
Quickly and dirtyly assembled by Gregor Lingl.
June, 2006