diff -r 5906162c8dd4 -r db8f94656024 src/HOL/Hoare/HeapSyntaxAbort.thy
--- a/src/HOL/Hoare/HeapSyntaxAbort.thy	Wed Dec 23 21:32:24 2020 +0100
+++ b/src/HOL/Hoare/HeapSyntaxAbort.thy	Wed Dec 23 22:25:22 2020 +0100
@@ -3,7 +3,11 @@
     Copyright   2002 TUM
 *)
 
-theory HeapSyntaxAbort imports Hoare_Logic_Abort Heap begin
+section \<open>Heap syntax (abort)\<close>
+
+theory HeapSyntaxAbort
+  imports Hoare_Logic_Abort Heap
+begin
 
 subsection "Field access and update"