--- a/mercurial/statichttprepo.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/statichttprepo.py	Fri Nov 08 11:19:20 2019 -0800
@@ -53,7 +53,7 @@
         if bytes:
             end = self.pos + bytes - 1
         if self.pos or end:
-            req.add_header(r'Range', r'bytes=%d-%s' % (self.pos, end))
+            req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
 
         try:
             f = self.opener.open(req)