minor fixes

Author: iliakan

1-js/11-async/08-async-await/04-promise-all-failure/task.md

@@ -42,7 +42,7 @@ Now here's the problem.
 We wrote the code to connect and send 3 queries in parallel (all of them take different time, e.g. 100, 200 and 300ms), then disconnect:
 
 ```js
-// Helper function to call async function fn after ms milliseconds
+// Helper function to call async function `fn` after `ms` milliseconds
 function delay(fn, ms) {
   return new Promise((resolve, reject) => {
     setTimeout(() => fn().then(resolve, reject), ms);
@@ -55,7 +55,7 @@ async function run() {
   try {
     await Promise.all([
       // these 3 parallel jobs take different time: 100, 200 and 300 ms
-      // we use delay helper to achieve this effect
+      // we use the `delay` helper to achieve this effect
 *!*
       delay(() => database.query(true), 100),
       delay(() => database.query(false), 200),