gulpfile.js
function highlight(code, lang) {
    const g = Prism.languages[lang];
    if (g) {
      return Prism.highlight(code, g, lang);
    }
    return code;
  }
function highlight(code, lang) {
    const g = Prism.languages[lang];
    if (g) {
      return Prism.highlight(code, g, lang);
    }
    return code;
  }
eslint-disable-line