diff -r a22915edc279 -r 8988c34bd018 mercurial/ui.py
--- a/mercurial/ui.py	Sun Mar 04 15:26:26 2018 -0500
+++ b/mercurial/ui.py	Sun Mar 04 15:53:10 2018 -0500
@@ -1757,7 +1757,7 @@
                   'ignoring)\n') % path.name)
         u.fragment = None
 
-    return str(u)
+    return bytes(u)
 
 @pathsuboption('pushrev', 'pushrev')
 def pushrevpathoption(ui, path, value):