### Summary

The config option `ALLOW_WORLD_READABLE_TMPFILES` should be removed from `lib/ansible/config/base.yml`. It was scheduled for removal in 2.14.

### Issue Type

Bug Report

### Component Name

`lib/ansible/config/base.yml`

### Ansible Version

2.14

### Configuration

N/A

### OS / Environment

N/A

### Steps to Reproduce

N/A

### Expected Results

N/A

### Actual Results

N/A
return ' '.join(['%s=%s' % (k, shlex_quote(text_type(v))) for k, v in args.items()])
        mock_connection = MagicMock()
        mock_co
        
        play_context = PlayContext()
        # a
        templar = Templar(loader=fake_loader)
        
        action_base = DerivedActionBase(
            task=mock_task,
            connection=mock_connection,
            play_context=play_context,
            loader=fake_loader,
            templar=templar,
            shared_loader_obj=None,
        )
        # t
        mock_task.environment = [dict(FOO='foo'), None]
        env_string = action_base._compute_environment_string()
        self.assertEqual(env_string, "FOO=foo")
        # t
        mock_task.environment = dict(FOO='foo')
        env_string = action_base._compute_environment_string()