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src/HOL/SMT_Examples/SMT_Tests.thy
changeset 67226 ec32cdaab97b
parent 66738 793e7a9c30c5 
--- a/src/HOL/SMT_Examples/SMT_Tests.thy	Tue Dec 19 14:51:27 2017 +0100
+++ b/src/HOL/SMT_Examples/SMT_Tests.thy	Tue Dec 19 13:58:12 2017 +0100
@@ -222,7 +222,7 @@
   by smt+
 
 
-section {* Natural numbers *}
+section \<open>Natural numbers\<close>
 
 declare [[smt_nat_as_int]]
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