human
Solve the following python programming problem given the following code:
def user_passes_test(test_func, login_url = None, redirect_field_name = REDIRECT_FIELD_NAME) : 
    'Replacement for django.contrib.auth.decorators.user_passes_test that
    returns 403 Forbidden if the user is already logged in.
    ' 
    if (not login_url) : 
        from django.conf import settings 
        login_url = settings.LOGIN_URL 
def decorator(view_func) : 
        @ wraps (view_func) 
        def wrapper(request, * args, **kwargs) : 
            if test_func (request.user) : 
                return view_func (request, * args, ** kwargs) 
else : 
                if request.user.is_authenticated () : 
                    return HttpResponseForbidden ('<h1>Permission denied</h1>') 
else : 
                    path = ('%s?%s=%s' % (login_url, redirect_field_name, urlquote (request.get_full_path ()))) 
                    return HttpResponseRedirect (path) 
return wrapper 
return test_func 

    
    

    Fix the buggy line: return test_func
assistant
#Here is Python code to fix the buggy line: return test_func
.

return def decorator(