minor fixes

1-js/09-classes/02-class-inheritance/3-class-extend-object/task.md

@@ -1,42 +0,0 @@
-importance: 3
-
----
-
-# Class extends Object?
-
-As we know, all objects normally inherit from `Object.prototype` and get access to "generic" object methods like `hasOwnProperty` etc.
-
-For instance:
-
-```js run
-class Rabbit {
-  constructor(name) {
-    this.name = name;
-  }
-}
-
-let rabbit = new Rabbit("Rab");
-
-*!*
-// hasOwnProperty method is from Object.prototype
-alert( rabbit.hasOwnProperty('name') ); // true
-*/!*
-```
-
-But if we spell it out explicitly like `"class Rabbit extends Object"`, then the result would be different from a simple `"class Rabbit"`?
-
-What's the difference?
-
-Here's an example of such code (it doesn't work -- why? fix it?):
-
-```js
-class Rabbit extends Object {
-  constructor(name) {
-    this.name = name;
-  }
-}
-
-let rabbit = new Rabbit("Rab");
-
-alert( rabbit.hasOwnProperty('name') ); // Error
-```