OOoUtils: Followup of 48e2e4fd: Parsed OOo file content is bytes().

bt5/erp5_accounting/TestTemplateItem/portal_components/test.erp5.testAccounting.py

@@ -3394,9 +3394,9 @@ class TestAccountingExport(AccountingTestCase):
         '40 - Payable',
         self.account_module.payable.Account_getFormattedTitle())
     # check that this account name can be found in the content
-    self.assertIn('40 - Payable', content_xml)
+    self.assertIn(b'40 - Payable', content_xml)
     # check that we don't have unknown categories
-    self.assertNotIn('???', content_xml)
+    self.assertNotIn(b'???', content_xml)
 
 
 class TestTransactions(AccountingTestCase):