Update article.md

Author: leviding

1-js/08-prototypes/01-prototype-inheritance/article.md

@@ -133,11 +133,11 @@ Also it may be obvious, but still: there can be only one `[[Prototype]]`. An obj
 
 
 ```smart header="`__proto__` is a historical getter/setter for `[[Prototype]]`"
-It's a common mistake of novice developers not to know the difference between these two. 
+It's a common mistake of novice developers not to know the difference between these two.
 
 Please note that `__proto__` is *not the same* as the internal `[[Prototype]]` property. It's a getter/setter for `[[Prototype]]`. Later we'll see situations where it matters,  for now let's just keep it in mind, as we build our understanding of JavaScript language.
 
-The `__proto__` property is a bit outdated. It exists for historical reasons, modern JavaScript suggests that we should use `Object.getPrototypeOf/Object.setPrototypeOf` functions instead that get/set the prototype. We'll also cover these functions later. 
+The `__proto__` property is a bit outdated. It exists for historical reasons, modern JavaScript suggests that we should use `Object.getPrototypeOf/Object.setPrototypeOf` functions instead that get/set the prototype. We'll also cover these functions later.
 
 By the specification, `__proto__` must only be supported by browsers. In fact though, all environments including server-side support `__proto__`, so we're quite safe using it.