--- a/mercurial/match.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/match.py	Fri Nov 08 11:19:20 2019 -0800
@@ -24,7 +24,7 @@
 )
 from .utils import stringutil
 
-rustmod = policy.importrust(r'filepatterns')
+rustmod = policy.importrust('filepatterns')
 
 allpatternkinds = (
     b're',