refactor arrow functions

Author: iliakan

Diff for: 1-js/02-first-steps/16-arrow-functions-basics/article.md

@@ -86,15 +86,19 @@ Like this:
 let sum = (a, b) => {  // the curly brace opens a multiline function
   let result = a + b;
 *!*
-  return result; // if we use curly braces, use return to get results
+  return result; // if we use curly braces, then we need an explicit "return" 
 */!*
 };
 
 alert( sum(1, 2) ); // 3
 ```
 
 ```smart header="More to come"
-Here we praised arrow functions for brevity. But that's not all! Arrow functions have other interesting features. We'll return to them later in the chapter <info:arrow-functions>.
+Here we praised arrow functions for brevity. But that's not all!
+
+Arrow functions have other interesting features.
+
+To study them in-depth, we first need to get to know some other aspects of JavaScript, so we'll return to arrow functions later in the chapter <info:arrow-functions>.
 
 For now, we can already use arrow functions for one-line actions and callbacks.
 ```