From 721dffe62ca6a37e6b496907af4eb007d59bff1c Mon Sep 17 00:00:00 2001
From: Radek Czajka <rczajka@rczajka.pl>
Date: Fri, 27 May 2022 13:00:03 +0200
Subject: [PATCH 1/1] fix for error msg

---
 src/librarian/elements/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librarian/elements/base.py b/src/librarian/elements/base.py
index 46ae29f..d17747d 100644
--- a/src/librarian/elements/base.py
+++ b/src/librarian/elements/base.py
@@ -221,7 +221,7 @@ class WLElement(etree.ElementBase):
         if self.SECTION_PRECEDENCE:
             assert isinstance(self.getparent(), (Master, DlugiCytat, PoezjaCyt, Footnote)), \
                     'Header {} inside a <{}> instead of a master.'.format(
-                            etree.tostring(self), self.getparent().tag)
+                            etree.tostring(self, encoding='unicode'), self.getparent().tag)
 
         for c in self:
             if isinstance(c, WLElement):
-- 
2.20.1