@ -266,7 +266,7 @@ class AuthenticatedFileHandler(IPythonHandler, web.StaticFileHandler):
abs_path = super(AuthenticatedFileHandler, self).validate_absolute_path(root, absolute_path)
abs_root = os.path.abspath(root)
if is_hidden(abs_root, abs_path):
raise web.HTTPError(403)
raise web.HTTPError(404)
return abs_path