old_contents: 'use strict'
  
  app.factory('challengeFactory', function($http) {
    return {
  
      loadChallenge: function(challengeNum) {
        $http.get('app/assets/challenges/challenges.json')
         .then(function(res){
            return res.data[challengeNum]
        })
      })
    }
  
  })
  
new_contents: 'use strict'
  
  app.factory('challengeFactory', function($http) {
    return {
  
      loadChallenge: function(challengeNum) {
        $http.get('app/assets/challenges/challenges.json')
         .then(function(res){
            return res.data[challengeNum]
          })
        })
      }
    
  })
  
subject: Update challengeFactory.js