Merge pull request #1139 from maurodibert/patch-67

Update article.md

Author: iliakan

1-js/09-classes/07-mixins/article.md

@@ -107,7 +107,7 @@ As `super` looks for parent methods in `[[HomeObject]].[[Prototype]]`, that mean
 
 Now let's make a mixin for real life.
 
-The important feature of many browser objects (not only) can generate events. Events is a great way to "broadcast information" to anyone who wants it. So let's make a mixin that allows to easily add event-related functions to any class/object.
+An important feature of many browser objects (not only) is that they can generate events. Events is a great way to "broadcast information" to anyone who wants it. So let's make a mixin that allows to easily add event-related functions to any class/object.
 
 - The mixin will provide a method `.trigger(name, [...data])` to "generate an event" when something important happens to it. The `name` argument is a name of the event, optionally followed by additional arguments with event data.
 - Also the method `.on(name, handler)` that adds `handler` function as the listener to events with the given name. It will be called when an event with the given `name` triggers, and get the arguments from `.trigger` call.