diff -r 9007f697e8ef -r c4e3ff497f89 mercurial/pure/bdiff.py
--- a/mercurial/pure/bdiff.py	Sat Dec 12 13:33:47 2015 -0500
+++ b/mercurial/pure/bdiff.py	Sat Dec 12 13:34:55 2015 -0500
@@ -5,7 +5,11 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-import struct, difflib, re
+from __future__ import absolute_import
+
+import difflib
+import re
+import struct
 
 def splitnewlines(text):
     '''like str.splitlines, but only split on newlines.'''