diff -r f2846d546645 -r 2f64e5a6efb8 mercurial/changelog.py
--- a/mercurial/changelog.py	Mon Jul 25 15:10:52 2016 +0200
+++ b/mercurial/changelog.py	Thu Aug 04 00:15:39 2016 +0530
@@ -138,9 +138,10 @@
         return appender(opener, name, mode, buf)
     return _delay
 
-_changelogrevision = collections.namedtuple('changelogrevision',
-                                            ('manifest', 'user', 'date',
-                                             'files', 'description', 'extra'))
+_changelogrevision = collections.namedtuple(u'changelogrevision',
+                                            (u'manifest', u'user', u'date',
+                                             u'files', u'description',
+                                             u'extra'))
 
 class changelogrevision(object):
     """Holds results of a parsed changelog revision.
@@ -151,8 +152,8 @@
     """
 
     __slots__ = (
-        '_offsets',
-        '_text',
+        u'_offsets',
+        u'_text',
     )
 
     def __new__(cls, text):