Function formatHeader

packages/cli/generators/copyright/header.js:136–139

* Format the header for a file * @param {string} file - JS/TS file * @param {string} pkg - Package json object * @param {object} options - Options

(file, pkg, options)

 * @param {object} options - Options
 */
async function formatHeader(file, pkg, options) {
  const header = await buildHeader(file, pkg, options);
  return header.split('\n').map(line => `//${line}`);
}

/**
 * Ensure the file is updated with the correct header