Fix tests in test_object that failed with pytest-5

tests/test_objects.py

@@ -380,6 +380,7 @@ def test_objects_keymap():
     assert keymap.get(Command('exit')) == []
     assert keymap.get(Command('PAGE_TOP')) == ['gg']
     assert keymap.get('upvote') == ['b', '<KEY_F5>']
+
     with pytest.raises(exceptions.ConfigError) as e:
         keymap.get('downvote')
         assert 'DOWNVOTE' in six.text_type(e)
@@ -389,9 +390,11 @@ def test_objects_keymap():
     keymap._keymap = {}
     keymap.set_bindings(bindings)
     assert keymap.get('refresh')
+
     with pytest.raises(exceptions.ConfigError) as e:
         keymap.get('upvote')
         assert 'UPVOTE' in six.text_type(e)
+
     keymap.set_bindings(bindings2)
     assert keymap.get('refresh')
     assert keymap.get('upvote')
@@ -403,6 +406,7 @@ def test_objects_keymap():
     assert KeyMap.parse('<KEY_UP>') == 259
     assert KeyMap.parse('<KEY_F5>') == 269
     assert KeyMap.parse('gg') == (103, 103)
+
     for key in ('', None, '<lf>', '<DNS>', '<KEY_UD>', '♬', 'ggg'):
         with pytest.raises(exceptions.ConfigError) as e:
             keymap.parse(key)