Function header

build-system/common/update-session-issues/index.js:547–548

(line, underline = /* em-dash */ '\u2014')

 * @return {string}
 */
const header = (line, underline = /* em-dash */ '\u2014') =>
  `\n${line}\n${new Array(line.length).fill(underline).join('')}`;

/**
 * @param {string} token