Update "Property flags and descriptors" article

Author: odsantos

1-js/07-object-properties/01-property-descriptors/article.md

@@ -63,7 +63,7 @@ Object.defineProperty(obj, propertyName, descriptor)
 ```
 
 `obj`, `propertyName`
-: The object and property to work on.
+: The object and its property to apply the descriptor.
 
 `descriptor`
 : Property descriptor object to apply.
@@ -116,14 +116,14 @@ Object.defineProperty(user, "name", {
 });
 
 *!*
-user.name = "Pete"; // Error: Cannot assign to read only property 'name'...
+user.name = "Pete"; // Error: Cannot assign to read only property 'name'
 */!*
 ```
 
 Now no one can change the name of our user, unless they apply their own `defineProperty` to override ours.
 
 ```smart header="Errors appear only in strict mode"
-In the non-strict mode, no errors occur when writing to non-writable properties and such. But the operation still won't succeed. Flag-violating actions are just silently ignored in non-strict.
+In non-strict mode, no errors occur when writing to non-writable properties and such. But the operation still won't succeed. Flag-violating actions are just silently ignored in non-strict.
 ```
 
 Here's the same example, but the property is created from scratch:
@@ -140,11 +140,10 @@ Object.defineProperty(user, "name", {
 */!*
 });
 
-alert(user.name); // Pete
-user.name = "Alice"; // Error
+alert(user.name); // John
+user.name = "Pete"; // Error
 ```
 
-
 ## Non-enumerable
 
 Now let's add a custom `toString` to `user`.