--- a/contrib/automation/hgautomation/aws.py	Mon Jan 06 01:44:46 2025 -0500
+++ b/contrib/automation/hgautomation/aws.py	Tue Jan 07 17:28:46 2025 -0500
@@ -332,7 +332,7 @@
         pub_full = key_path / f
         priv_full = key_path / ('keypair-%s' % name)
 
-        with open(pub_full, 'r', encoding='ascii') as fh:
+        with open(pub_full, encoding='ascii') as fh:
             data = fh.read()
 
         if not data.startswith('ssh-rsa '):