anchor.diff:  .Response with gauge data points
   ----
   [
  -  {"timestamp:" 1460413065369, "value": 3.14},
  -  {"timestamp:" 1460212025569, "value": 4.57},
  -  {"timestamp:" 1460111065369, "value": 5.056}
  +  {"timestamp": 1460413065369, "value": 3.14},
  +  {"timestamp": 1460212025569, "value": 4.57},
  +  {"timestamp": 1460111065369, "value": 5.056}
   ]
   ----
   
  
positive.code: .request.json
  ----
  [
    {"timestamp:" 1460413065369, "value": "down"},
    {"timestamp:" 1460413025569, "value": "down"},
    {"timestamp:" 1460111065369, "value": "up"}
  ]
  ----
  
  
negative.code: .request.json
  ----
  [
    {"timestamp": 1460413065369, "value": 69},
    {"timestamp": 1460413025569, "value": 65},
    {"timestamp": 1460111065369, "value": 51}
  ]
  ----
  
  