From 266ff017f5a208936026dff93ffcd50a07e80337 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Sat, 21 Apr 2012 12:54:46 -0400
Subject: [PATCH] No b'...'.format() method (see
 http://bugs.python.org/issue3982).

---
 pyassuan/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyassuan/common.py b/pyassuan/common.py
index 2beed99..d3e2915 100644
--- a/pyassuan/common.py
+++ b/pyassuan/common.py
@@ -220,7 +220,7 @@ class Response (object):
     def __bytes__(self):
         if self.parameters:
             if self.type == 'D':
-                return b'{} {}'.format(b'D', self.parameters)
+                return b' '.join((b'D', self.parameters))
             else:
                 return '{} {}'.format(
                     self.type, encode(self.parameters)).encode('utf-8')
-- 
2.26.2