--- a/mercurial/revlog.py	Tue Mar 07 22:41:24 2006 +0100
+++ b/mercurial/revlog.py	Wed Mar 08 00:27:23 2006 +0100
@@ -48,7 +48,7 @@
     if t == '\0': return bin
     if t == 'x': return zlib.decompress(bin)
     if t == 'u': return bin[1:]
-    raise RevlogError(_("unknown compression type %s") % t)
+    raise RevlogError(_("unknown compression type %r") % t)
 
 indexformat = ">4l20s20s20s"