hunk.code_window:   app.use(morgan("dev"));
   }
   // server-side redirect
   app.get("/user-gists/:username", (req, res) => {
     res.redirect(301, `/gists/${req.params.username}`);
   });
  
hunk.labels: keep keep add keep keep keep keep
hunk.after_edit: app.get("/fails.css", (req, res) => {
     res.status(500).send("Boom! No CSS here!");
   });
  
hunk.file_path: fixtures/gists-app/server.js
hunk.type: add
file: export default function Gists() {
    return (
      <div data-test-id="/gists/mine">
        <h1>My Gists</h1>
      </div>
    );
  }
  