--- a/hgext/infinitepush/common.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/hgext/infinitepush/common.py	Fri Nov 08 11:19:20 2019 -0800
@@ -37,7 +37,7 @@
     fd, bundlefile = pycompat.mkstemp()
     try:  # guards bundlefile
         try:  # guards fp
-            fp = os.fdopen(fd, r'wb')
+            fp = os.fdopen(fd, 'wb')
             fp.write(data)
         finally:
             fp.close()