diff -r d8d4fa9a7f18 -r a0ec05d93c8e mercurial/branchmap.py
--- a/mercurial/branchmap.py	Thu Jan 16 13:34:04 2020 +0100
+++ b/mercurial/branchmap.py	Mon Feb 10 17:31:05 2020 -0500
@@ -291,8 +291,8 @@
                     % (
                         _branchcachedesc(repo),
                         pycompat.bytestr(
-                            inst  # pytype: disable=wrong-arg-types
-                        ),
+                            inst
+                        ),  # pytype: disable=wrong-arg-types
                     )
                 )
             bcache = None