diff -r c5f6f58f6c71 -r c207c46a86b9 mercurial/pure/parsers.py
--- a/mercurial/pure/parsers.py	Tue Nov 12 15:53:58 2019 -0800
+++ b/mercurial/pure/parsers.py	Wed Nov 13 09:09:42 2019 +0100
@@ -49,7 +49,7 @@
 class BaseIndexObject(object):
     @property
     def nodemap(self):
-        msg = "index.nodemap is deprecated, " "use index.[has_node|rev|get_rev]"
+        msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self._nodemap