Update article.md

Fixed typos and made grammar changes.

Author: abdullah-manzoor-ba

1-js/11-async/08-async-await/article.md

@@ -24,7 +24,7 @@ async function f() {
 f().then(alert); // 1
 ```
 
-...We could explicitly return a promise, that would be the same:
+...We could explicitly return a promise, that would be the same as:
 
 ```js run
 async function f() {
@@ -72,7 +72,7 @@ Let's emphasize: `await` literally makes JavaScript wait until the promise settl
 It's just a more elegant syntax of getting the promise result than `promise.then`, easier to read and write.
 
 ````warn header="Can't use `await` in regular functions"
-If we try to use `await` in non-async function, that would be a syntax error:
+If we try to use `await` in non-async function, there would be a syntax error:
 
 ```js run
 function f() {
@@ -250,7 +250,7 @@ async function f() {
 f();
 ```
 
-If we don't have `try..catch`, then the promise generated by the call of the async function `f()` becomes rejected. We can append `.catch` to handle it:
+If we don't have `try..catch` and a promise generated by the call of the async function `f()` becomes rejected. We can append `.catch` to handle it:
 
 ```js run
 async function f() {
@@ -263,7 +263,7 @@ f().catch(alert); // TypeError: failed to fetch // (*)
 */!*
 ```
 
-If we forget to add `.catch` there, then we get an unhandled promise error (and can see it in the console). We can catch such errors using a global event handler as described in the chapter <info:promise-error-handling>.
+If we forget to add `.catch` there, then we get an unhandled promise error (viewable in the console). We can catch such errors using a global event handler as described in the chapter <info:promise-error-handling>.
 
 
 ```smart header="`async/await` and `promise.then/catch`"