fix some assert messages

Author: zloirock

tests/unit-global/esnext.iterator.chunks.js

@@ -12,8 +12,8 @@ QUnit.test('Iterator#chunks', assert => {
   assert.looksNative(chunks);
   assert.nonEnumerable(Iterator.prototype, 'chunks');
 
-  assert.arrayEqual(from(chunks.call(createIterator([1, 2, 3]), 2)), [[1, 2], [3]], 'basic functionality');
-  assert.arrayEqual(from(chunks.call(createIterator([1, 2, 3, 4]), 2)), [[1, 2], [3, 4]], 'basic functionality');
+  assert.arrayEqual(from(chunks.call(createIterator([1, 2, 3]), 2)), [[1, 2], [3]], 'basic functionality #1');
+  assert.arrayEqual(from(chunks.call(createIterator([1, 2, 3, 4]), 2)), [[1, 2], [3, 4]], 'basic functionality #2');
   assert.arrayEqual(from(chunks.call(createIterator([]), 2)), [], 'basic functionality on empty iterable');
 
   const it = createIterator([1, 2, 3]);