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src/HOL/Option.thy
changeset 58310 91ea607a34d8
parent 58154 47c3c7019b97
child 58889 5b7a9633cfa8 
--- a/src/HOL/Option.thy	Thu Sep 11 19:26:59 2014 +0200
+++ b/src/HOL/Option.thy	Thu Sep 11 19:32:36 2014 +0200
@@ -8,7 +8,7 @@
 imports BNF_Least_Fixpoint Finite_Set
 begin
 
-datatype_new 'a option =
+datatype 'a option =
     None
   | Some (the: 'a)
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