anchor.diff:        The good news is that they're extremely easy to polyfill (#[a(href="/polyfills/promise-" + versions.promise + ".js") link]):
       .small-code(href="/polyfills/promise-" + versions.promise + ".js")
         :html
  -        <script src="http://promisejs.org/polyfills/promise-#{versions.promise}.js"></script>
  +        <script src="https://www.promisejs.org/polyfills/promise-#{versions.promise}.js"></script>
       
       p.
         None of the browsers currently support #[code Promise.prototype.done]
  
positive.code: 
          .small-code
            :html
              <script src="http://promisejs.org/polyfills/promise-done-1.0.0.js"></script>
      h2#then Transformation / Chaining
  
      p.
  
negative.code: 
      .small-code
        :html
          <script src="https://www.promisejs.org/polyfills/promise-done-1.0.0.js"></script>
  
      h3 Node.js
      
  