--- a/mercurial/templatefilters.py	Mon Mar 13 09:24:53 2017 -0700
+++ b/mercurial/templatefilters.py	Wed Mar 15 23:06:50 2017 +0900
@@ -345,7 +345,7 @@
 
 @templatefilter('stringescape')
 def stringescape(text):
-    return text.encode('string_escape')
+    return util.escapestr(text)
 
 @templatefilter('stringify')
 def stringify(thing):