diff -r 9cc55b743713 -r 57875cf423c9 mercurial/cacheutil.py
--- a/mercurial/cacheutil.py	Fri Oct 04 15:53:45 2019 -0400
+++ b/mercurial/cacheutil.py	Sat Oct 05 10:29:34 2019 -0400
@@ -8,6 +8,7 @@
 
 from . import repoview
 
+
 def cachetocopy(srcrepo):
     """return the list of cache file valuable to copy during a clone"""
     # In local clones we're copying all nodes, not just served