Update article.md

"**and** more attributes...

Author: paroche

2-ui/1-document/06-dom-attributes-and-properties/article.md

@@ -307,7 +307,7 @@ Because an attribute is more convenient to manage. The state can be changed as e
 div.setAttribute('order-state', 'canceled');
 ```
 
-But there may be a possible problem with custom attributes. What if we use a non-standard attribute for our purposes and later the standard introduces it and makes it do something? The HTML language is alive, it grows, more attributes appear to suit the needs of developers. There may be unexpected effects in such case.
+But there may be a possible problem with custom attributes. What if we use a non-standard attribute for our purposes and later the standard introduces it and makes it do something? The HTML language is alive, it grows, and more attributes appear to suit the needs of developers. There may be unexpected effects in such case.
 
 To avoid conflicts, there exist [data-*](https://html.spec.whatwg.org/#embedding-custom-non-visible-data-with-the-data-*-attributes) attributes.