anchor.diff:                  let response = yield fetch('/api/data');
                   let json = yield response.json();
                   let data = JSON.parse(json);
  -                let response2 = yield fetch(`/api/data/${data.id}`);
  +                let resp2 = yield fetch(`/api/x/${data.id}`);
                   ...
                 } catch (err) {
                   console.log(err);
  
positive.code:             }).then((json) => {
                return data = JSON.parse(json);
              }).then((data) => {
                return fetch(`/api/data/${data.id}`);
              })
              ....
              }).catch((err) => {
  
negative.code:         h2 Generators
          pre
            code.language-javascript.
              for (let n of fib) {
                if (n > 1000) {
                  break;
  