magento-test/dev/tools/grunt/configs/styledocco.json

{
  "documentation": {
    "options": {
      "name": "Magento UI Library",
      "verbose": true,
      "include": ["<%= path.doc %>/docs.css"]
    },
    "files": {
      "<%= path.doc %>": "<%= path.doc %>/source"
    }
  }
}