lib/sup/undo.rb in sup-0.16.0 vs lib/sup/undo.rb in sup-0.17.0

@@ -6,10 +6,10 @@
 ## things. When an action is called (such as 'archive'),
 ## a lambda is registered with UndoManager that will
 ## undo the archival action
 
 class UndoManager
-  include Singleton
+  include Redwood::Singleton
 
   def initialize
     @@actionlist = []
   end