--- a/mercurial/pure/osutil.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/pure/osutil.py	Fri Nov 08 11:19:20 2019 -0800
@@ -218,7 +218,7 @@
     def _raiseioerror(name):
         err = ctypes.WinError()
         raise IOError(
-            err.errno, r'%s: %s' % (encoding.strfromlocal(name), err.strerror)
+            err.errno, '%s: %s' % (encoding.strfromlocal(name), err.strerror)
         )
 
     class posixfile(object):
@@ -280,8 +280,8 @@
             # unfortunately, f.name is '<fdopen>' at this point -- so we store
             # the name on this wrapper. We cannot just assign to f.name,
             # because that attribute is read-only.
-            object.__setattr__(self, r'name', name)
-            object.__setattr__(self, r'_file', f)
+            object.__setattr__(self, 'name', name)
+            object.__setattr__(self, '_file', f)
 
         def __iter__(self):
             return self._file