Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/scripts/beer.py b/Demo/scripts/beer.py
index 1b9ac8b..f050572 100644
--- a/Demo/scripts/beer.py
+++ b/Demo/scripts/beer.py
@@ -8,7 +8,7 @@
     if n == 1: return "one bottle of beer"
     return str(n) + " bottles of beer"
 for i in range(n):
-    print bottle(n-i), "on the wall,"
-    print bottle(n-i) + "."
-    print "Take one down, pass it around,"
-    print bottle(n-i-1), "on the wall."
+    print(bottle(n-i), "on the wall,")
+    print(bottle(n-i) + ".")
+    print("Take one down, pass it around,")
+    print(bottle(n-i-1), "on the wall.")