Update sum-test.js

Author: hipertracker

src/__tests__/sum-test.js

@@ -1,9 +1,9 @@
-jest.dontMock('../sum'); // of jest.autoMockOff();
+jest.dontMock('../sum'); // or jest.autoMockOff();
 
 var sum = require('../sum')['default'];
 
 describe('sum', function () {
     it('adds 1 + 2 to equal 3', function () {
         expect(sum(1, 2)).toBe(3);
     });
-});
+});