--- a/Structure.st	Sat Aug 15 13:00:50 2020 +0200
+++ b/Structure.st	Sun Aug 16 13:54:35 2020 +0200
@@ -1253,7 +1253,7 @@
     ].
 
     (sel == #displayString) ifTrue:[
-        s := CharacterWriteStream on:''.
+        s := CharacterWriteStream new.
         self displayOn:s.
         ^ s contents
     ].