diff -r 46f59511b7bb -r d97fdabd9e2b src/HOL/Library/Rewrite.thy
--- a/src/HOL/Library/Rewrite.thy	Fri Sep 20 19:07:10 2024 +0200
+++ b/src/HOL/Library/Rewrite.thy	Fri Sep 20 19:51:08 2024 +0200
@@ -10,7 +10,7 @@
 imports Main
 begin
 
-consts rewrite_HOLE :: "'a::{}"  ("\<hole>")
+consts rewrite_HOLE :: "'a::{}"  (\<open>\<hole>\<close>)
 
 lemma eta_expand:
   fixes f :: "'a::{} \<Rightarrow> 'b::{}"