feat(worker/respec-worker): error recovery if code parsing fails

worker/respec-worker.js

@@ -26,7 +26,7 @@ self.addEventListener("message", function(e) {
       } catch (err) {
         console.error("Could not transform some code?", err);
         // Post back the original unhighlighted code.
-        const fallbackData = Object.assign({}, e.data, {value: e.data.code});
+        const fallbackData = Object.assign({}, e.data, { value: e.data.code });
         self.postMessage(data);
       }
   }