mercurial/bundle2.py

--- a/mercurial/bundle2.py	Tue May 26 22:49:03 2015 -0700
+++ b/mercurial/bundle2.py	Tue May 26 22:57:35 2015 -0700
@@ -175,7 +175,7 @@
 
 def outdebug(ui, message):
     """debug regarding output stream (bundling)"""
-    ui.debug(message)
+    ui.debug('bundle2-output: %s' % message)
 
 def validateparttype(parttype):
     """raise ValueError if a parttype contains invalid character"""