api: make all tests for API pass

rhodecode/api/tests/utils.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2020 RhodeCode GmbH
 #
@@ -50,7 +49,7 @@ def assert_ok(id_, expected, given):
     given = json.loads(given)
     if given.get('error'):
         err = given['error']
-        pytest.fail(u"Unexpected ERROR in success response: {}".format(err))
+        pytest.fail(f"Unexpected ERROR in expected success response: `{err}`")
 
     expected = jsonify({
         'id': id_,