minor

1-js/04-object-basics/01-object/article.md

@@ -129,7 +129,7 @@ let key = "likes birds";
 user[key] = true;
 ```
 
-Here, the variable `key` may be calculated at run-time or depend on the user input. And then we use it to access the property. That gives us a great deal of flexibility. 
+Here, the variable `key` may be calculated at run-time or depend on the user input. And then we use it to access the property. That gives us a great deal of flexibility.
 
 For instance:
 
@@ -145,7 +145,7 @@ let key = prompt("What do you want to know about the user?", "name");
 alert( user[key] ); // John (if enter "name")
 ```
 
-The dot notation cannot be used in a similar way.
+The dot notation cannot be used in a similar way:
 
 ```js run
 let user = {
@@ -235,6 +235,7 @@ That can become a source of bugs and even vulnerabilities if we intend to store
 In that case the visitor may choose `__proto__` as the key, and the assignment logic will be ruined (as shown above).
 
 There is a way to make objects treat `__proto__` as a regular property, which we'll cover later, but first we need to know more about objects.
+
 There's also another data structure [Map](info:map-set-weakmap-weakset), that we'll learn in the chapter <info:map-set-weakmap-weakset>, which supports arbitrary keys.
 ````