--- a/mercurial/scmposix.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/scmposix.py	Fri Nov 08 11:19:20 2019 -0800
@@ -84,7 +84,7 @@
             if not os.isatty(fd):
                 continue
             arri = fcntl.ioctl(fd, TIOCGWINSZ, b'\0' * 8)
-            height, width = array.array(r'h', arri)[:2]
+            height, width = array.array('h', arri)[:2]
             if width > 0 and height > 0:
                 return width, height
         except ValueError: