Change example comments

Author: tshemsedinov

JavaScript/1-identifiers.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// Arguments instead of mutable variables
+// Arguments instead of mutable variables assignment
 
 const { PI, sqrt } = Math;
 const square = x => x * x;

JavaScript/2-condition.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// Calls instead of if statement
+// Conditional expression instead of Conditional statement
 
 const person = {
   name: 'Marcus Aurelius',

JavaScript/3-iteration.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// Call or recursion instead of for loops
+// Recursion calls instead of for loops
 
 const numbers = [2, 7, -1, -5, 8];