Merge Py Idle changes:

Rev 1.4 fdrake
Use string.ascii_letters instead of string.letters (SF bug #226706)

Rev 1.5 doerwalter
(string methods)

Lib/idlelib/UndoDelegator.py

@@ -251,7 +251,7 @@ class InsertCommand(Command):
         self.chars = self.chars + cmd.chars
         return 1
 
-    alphanumeric = string.letters + string.digits + "_"
+    alphanumeric = string.ascii_letters + string.digits + "_"
 
     def classify(self, c):
         if c in self.alphanumeric:
@@ -311,7 +311,7 @@ class CommandSequence(Command):
         strs = []
         for cmd in self.cmds:
             strs.append("    " + `cmd`)
-        return s + "(\n" + string.join(strs, ",\n") + "\n)"
+        return s + "(\n" + ",\n".join(strs) + "\n)"
 
     def __len__(self):
         return len(self.cmds)