newsupernova/vendor/magento/magento2-base/dev/tools/grunt/configs/concat.json

{
    "options": {
        "stripBanners": true,
        "banner": "/**\n * Copyright © <%= grunt.template.today(\"yyyy\") %> Magento. All rights reserved.\n * See COPYING.txt for license details.\n */\n"
    },
    "setup": {
        "src": "<%= path.css.setup %>/setup.css",
        "dest": "<%= path.css.setup %>/setup.css"
    }
}