diff -r ae74a60ad583 -r ba602ddcb296 mercurial/commands.py
--- a/mercurial/commands.py	Fri Jun 09 14:31:40 2023 +0100
+++ b/mercurial/commands.py	Fri Jun 09 14:32:09 2023 +0100
@@ -5219,7 +5219,7 @@
                     value = b'yes'
                 else:
                     value = b'no'
-            fm.condwrite(showsubopts, subopt, b'%s\n', value)
+            fm.condwrite(showsubopts, subopt, b'%s\n', pycompat.bytestr(value))
 
     fm.end()