mercurial/setdiscovery.py

--- a/mercurial/setdiscovery.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/setdiscovery.py	Fri Nov 08 11:19:20 2019 -0800
@@ -278,7 +278,7 @@
 
 
 partialdiscovery = policy.importrust(
-    r'discovery', member=r'PartialDiscovery', default=partialdiscovery
+    'discovery', member='PartialDiscovery', default=partialdiscovery
 )