fix final failing spec!

Author: mLuby

lib/spec.js

@@ -252,9 +252,9 @@ describe('Recommendation Engine', function () {
 
     it('close to 0.0 when some similar users like that item and other similar users dislike it', function () {
       var users = [
-        {id: 1, likes: [1,2,3,4], dislikes: [6]},
-        {id: 2, likes: [1,2,3,4], dislikes: [5]},
-        {id: 3, likes: [3,4,2,1], dislikes: [7]}
+        {id: 1, likes: [1,2,3,4], dislikes: []},
+        {id: 2, likes: [1,2,3,4,5], dislikes: []},
+        {id: 3, likes: [3,4,2,1], dislikes: [5]}
       ]
       var itemId = 5
       expect(predictLike(itemId, users[0], users)).to.equal(0.0)