diff -r 1a9decb8bfbc -r ae9e6218443d src/HOL/Library/Signed_Division.thy
--- a/src/HOL/Library/Signed_Division.thy	Mon Apr 10 23:21:47 2023 +0200
+++ b/src/HOL/Library/Signed_Division.thy	Tue Apr 11 11:59:02 2023 +0000
@@ -1,7 +1,7 @@
 (*  Author:  Stefan Berghofer et al.
 *)
 
-subsection \<open>Signed division: negative results rounded towards zero rather than minus infinity.\<close>
+section \<open>Signed division: negative results rounded towards zero rather than minus infinity.\<close>
 
 theory Signed_Division
   imports Main