diff -r 346af7687c6f -r 89a2afe31e82 mercurial/logexchange.py
--- a/mercurial/logexchange.py	Fri Nov 27 17:00:00 2020 -0500
+++ b/mercurial/logexchange.py	Fri Nov 27 17:03:29 2020 -0500
@@ -141,7 +141,10 @@
 
     with remoterepo.commandexecutor() as e:
         bookmarks = e.callcommand(
-            b'listkeys', {b'namespace': b'bookmarks',}
+            b'listkeys',
+            {
+                b'namespace': b'bookmarks',
+            },
         ).result()
 
     # on a push, we don't want to keep obsolete heads since