diff -r 143f58bb34f9 -r 0909deb8059b src/HOL/Import/HOL_Light_Import.thy
--- a/src/HOL/Import/HOL_Light_Import.thy	Thu May 26 16:57:14 2016 +0200
+++ b/src/HOL/Import/HOL_Light_Import.thy	Thu May 26 17:51:22 2016 +0200
@@ -3,7 +3,7 @@
     Author:     Alexander Krauss, QAware GmbH
 *)
 
-section {* Main HOL Light importer *}
+section \<open>Main HOL Light importer\<close>
 
 theory HOL_Light_Import
 imports HOL_Light_Maps