Better variables example

Author: Benjamin De Cock

README.md

@@ -30,7 +30,7 @@ HTML5 provides us with lots of semantic elements aimed to describe precisely the
 </main>
 ```
 
-Make sure you understand the semantic of the elements you're using. It's worse to use a semantic
+Make sure you understand the semantics of the elements you're using. It's worse to use a semantic
 element in a wrong way than staying neutral.
 
 ```html
@@ -730,13 +730,12 @@ Favor `const` over `let` and `let` over `var`.
 
 ```javascript
 // bad
-var obj = {};
-obj["foo" + "bar"] = "baz";
+var me = new Map();
+me.set("name", "Ben").set("country", "Belgium");
 
 // good
-const obj = {
-  ["foo" + "bar"]: "baz"
-};
+const me = new Map();
+me.set("name", "Ben").set("country", "Belgium");
 ```
 
 ### Conditions