From acd683b3ac285f8d07fe94af43d526fb6afa7984 Mon Sep 17 00:00:00 2001
From: Eli Schwartz <eschwartz@archlinux.org>
Date: Tue, 5 Feb 2019 00:17:43 -0500
Subject: [PATCH] remove incorrect use of b'' string

There's no need to check on python2 that a string in os.environ is a
bytestring, and it breaks hard on python3.
---
 src/calibre/constants.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/constants.py b/src/calibre/constants.py
index aefd0ea4ba..e44683c1ff 100644
--- a/src/calibre/constants.py
+++ b/src/calibre/constants.py
@@ -87,7 +87,7 @@ else:
         filesystem_encoding = 'utf-8'
 
 
-DEBUG = b'CALIBRE_DEBUG' in os.environ
+DEBUG = 'CALIBRE_DEBUG' in os.environ
 
 
 def debug():