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-rw-r--r--isar/ex/PER.thy2
1 files changed, 1 insertions, 1 deletions
diff --git a/isar/ex/PER.thy b/isar/ex/PER.thy
index 7f59c742..068885bd 100644
--- a/isar/ex/PER.thy
+++ b/isar/ex/PER.thy
@@ -1,5 +1,5 @@
(**********
- This file is copied from Isabelle2009-2.
+ This file is copied from Isabelle2011.
It has been beautified with Tokens \<rightarrow> Replace Shortcuts
**********)