Test files linted

test/sample/sample.test.js

@@ -4,7 +4,7 @@ const sample = require('./sample.js');
 test('sample is a Function', () => {
   expect(sample).toBeInstanceOf(Function);
 });
-const arr = [3,7,9,11];
+const arr = [3, 7, 9, 11];
 test('Returns a random element from the array', () => {
   expect(arr.includes(sample(arr))).toBeTruthy();
 });