diff -r e63843793f01 -r 1d58c0491d5e mercurial/changelog.py
--- a/mercurial/changelog.py	Fri Dec 05 22:22:14 2008 +0100
+++ b/mercurial/changelog.py	Sat Dec 06 14:27:31 2008 +0100
@@ -179,7 +179,7 @@
 
         user = user.strip()
         if "\n" in user:
-            raise RevlogError(_("username %s contains a newline") % `user`)
+            raise RevlogError(_("username %s contains a newline") % repr(user))
         user, desc = util.fromlocal(user), util.fromlocal(desc)
 
         if date: