From 309e6be0e83b5ed08f954c7dd66c5e8cf959a006 Mon Sep 17 00:00:00 2001
From: Bert JW Regeer <bertjw@regeer.org>
Date: Mon, 6 Feb 2017 21:32:03 -0700
Subject: stringify self.detail in case it is not a string

---
 pyramid/httpexceptions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyramid/httpexceptions.py b/pyramid/httpexceptions.py
index a22b088c6..1f3934fdc 100644
--- a/pyramid/httpexceptions.py
+++ b/pyramid/httpexceptions.py
@@ -238,7 +238,7 @@ ${body}''')
             del self.content_length
 
     def __str__(self):
-        return self.detail or self.explanation
+        return str(self.detail) if self.detail else self.explanation
 
     def _json_formatter(self, status, body, title, environ):
         return {'message': body,
-- 
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