Improve test case of 4-do-while exercise

Exercises/4-do-while.test

@@ -10,7 +10,7 @@
   ],
   test: sum => {
     const src = sum.toString();
-    if (!src.includes('while (')) throw new Error('Use while loop');
+    if (!src.includes('do {') || !src.includes('} while (')) throw new Error('Use do...while loop');
     if (!src.includes('let')) throw new Error('Use let to define accumulator');
     if (!src.includes('return')) throw new Error('Use return');
   }

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017-2021 How.Programming.Works contributors
+Copyright (c) 2017-2023 How.Programming.Works contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Solutions/6-matrix.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const max = matrix => {
+const max = (matrix) => {
   let value = matrix[0][0];
   for (let i = 0; i < matrix.length; i++) {
     const row = matrix[i];

Solutions/7-ages.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const ages = persons => {
+const ages = (persons) => {
   const data = {};
   for (const name in persons) {
     const person = persons[name];