mercurial/util.py

--- a/mercurial/util.py	Sun Oct 06 13:17:19 2019 -0400
+++ b/mercurial/util.py	Sun Oct 06 13:28:56 2019 -0400
@@ -35,6 +35,7 @@
 import warnings
 
 from .thirdparty import attr
+from .pycompat import open
 from hgdemandimport import tracing
 from . import (
     encoding,