[Zope] clean up Data.fs?

[Dieter Maurer]

Kyler B. Laird writes:
 > 
 > I have a Data.fs that I've been building up
 > over many versions of Zope.  Somewhere along
 > the line, I noticed that "Undo" stopped
 > working in many situations.  Now it's almost
 > never usable.  I get errors like
 > 	
 > 	Error Type: UndoError
 > 	Error Value: Couldn't undo change to '\x00\x00\x00\x00\x00\x00\x19r' because
 > 	non-undoable transaction
A non-undoable transaction means that a later transaction is dependent
on this one. They can only be undone together.


Dieter