From dc96af576365820d85d094536cee05a9a66b4207 Mon Sep 17 00:00:00 2001
From: Eli Schwartz <eschwartz@archlinux.org>
Date: Thu, 9 May 2019 13:49:56 -0400
Subject: [PATCH] py3: textwrap.dedent requires unicode strings, encode after
 the fact

Also all the format arguments are unicode strings, *and* in the wisdom
of python3, you can % format a bytestring but not .format() it.
---
 src/calibre/ebooks/docx/writer/container.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/calibre/ebooks/docx/writer/container.py b/src/calibre/ebooks/docx/writer/container.py
index 82ae0bd8f7..9dd894db8b 100644
--- a/src/calibre/ebooks/docx/writer/container.py
+++ b/src/calibre/ebooks/docx/writer/container.py
@@ -223,13 +223,13 @@ class DOCX(object):
 
     @property
     def containerrels(self):
-        return textwrap.dedent(b'''\
+        return textwrap.dedent('''\
         <?xml version='1.0' encoding='utf-8'?>
         <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
             <Relationship Id="rId3" Type="{APPPROPS}" Target="docProps/app.xml"/>
             <Relationship Id="rId2" Type="{DOCPROPS}" Target="docProps/core.xml"/>
             <Relationship Id="rId1" Type="{DOCUMENT}" Target="word/document.xml"/>
-        </Relationships>'''.format(**self.namespace.names))
+        </Relationships>'''.format(**self.namespace.names)).encode('utf-8')
 
     @property
     def websettings(self):