anchor.diff:  [source,js]
   --------------------------------------------------
   {
  -    text: {
  -        type:      "string",
  -        fielddata: {
  -            format: "disabled"
  +    "text": {
  +        "type":      "string",
  +        "fielddata": {
  +            "format": "disabled"
           }
       }
   }
  
positive.code: [source,js]
  --------------------------------------------------
  {
      tweet: {
          type:      "string",
          analyzer:  "whitespace"
          fielddata: {
              filter: {
                  regex: {
                      pattern: "^#.*"
                  }
              }
          }
  
negative.code: [source,js]
  --------------------------------------------------
  {
      "category": {
          "type":      "string",
          "fielddata": {
              "loading": "eager"
          }
      }
  }
  