message: Remove comma, rephrase description.
diff: {
  "dateClose": "2014-12-01",
  "dateOpen": "2017-12-15",
  - "description": "API for AR apps, dead and replaced by ARCore",
  + "description": "Project Tango was an API for augmented reality apps that was killed and replaced by ARCore",
  "link": "https://en.wikipedia.org/wiki/Tango_(platform)",
  "name": "Project Tango"
  - },
  + }
  ]
  