diff -r dc36535a5edc -r 9db77d46de79 mercurial/mail.py
--- a/mercurial/mail.py	Mon Jan 06 14:07:43 2025 -0500
+++ b/mercurial/mail.py	Mon Jan 06 14:15:40 2025 -0500
@@ -528,4 +528,4 @@
         except UnicodeDecodeError:
             pass
         uparts.append(part.decode('ISO-8859-1'))
-    return encoding.unitolocal(u' '.join(uparts))
+    return encoding.unitolocal(' '.join(uparts))