--- a/mercurial/hgweb/wsgiheaders.py	Thu Nov 07 03:59:22 2019 -0800
+++ b/mercurial/hgweb/wsgiheaders.py	Thu Nov 07 13:18:19 2019 -0500
@@ -129,7 +129,7 @@
         return self._headers[:]
 
     def __repr__(self):
-        return r"%s(%r)" % (self.__class__.__name__, self._headers)
+        return "%s(%r)" % (self.__class__.__name__, self._headers)
 
     def __str__(self):
         """str() returns the formatted headers, complete with end line,