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src/HOL/Isar_examples/BasicLogic.thy
changeset 7306 cd0533d52e55
parent 7233 75cc3a327bd4
child 7449 ebd975549ffe 
--- a/src/HOL/Isar_examples/BasicLogic.thy	Fri Aug 20 15:42:20 1999 +0200
+++ b/src/HOL/Isar_examples/BasicLogic.thy	Fri Aug 20 15:42:46 1999 +0200
@@ -27,7 +27,7 @@
 qed;
 
 lemma K': "A --> B --> A";
-proof intro+;
+proof intro;
   assume A;
   show A; .;
 qed;
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