--- a/mercurial/utils/cborutil.py	Sat Jan 04 10:38:02 2025 -0500
+++ b/mercurial/utils/cborutil.py	Mon Jan 06 20:25:11 2025 -0500
@@ -236,7 +236,7 @@
             break
 
     if not fn:
-        raise ValueError(b'do not know how to encode %s' % type(v))
+        raise ValueError('do not know how to encode %s' % type(v))
 
     return fn(v)