anchor.diff:      }
   }
   ----
  -Several Maven dependencies are required: `ch.qos.logback.contrib:logback-json-classic:0.1.5`, `ch.qos.logback.contrib:logback-jackson:0.1.5` and `com.fasterxml.jackson.core:jackson-databind`.
  +Several Maven dependencies are required `ch.qos.logback.contrib:logback-json-classic:0.1.5`, 
  +`ch.qos.logback.contrib:logback-jackson:0.1.5` and `com.fasterxml.jackson.core:jackson-databind`
  +for this library to work.
  +
  +In the end both libraries are similar, both are based on the Jackson library and produce one JSON document per line.
  +This format is known as http://ndjson.org/[NDJSON] or and http://jsonlines.org/[JSON Lines].
  +Logstash and Filebeat can easily read this kind of JSON file.
  
positive.code:   "@timestamp": "2017-11-25T21:10:29.178+01:00",
    "@version": 1,
    "message": "Hello world!",
    "logger_name": "logodissey.DemoLogger",
    "thread_name": "Thread-1",
    "level": "INFO",
    "level_value": 20000,
  
negative.code: To avoid forgetting to do housekeeping afterwards, we can use a try-with-resource construct:
  [source,java]
  ----
  try(MDC.MDCCloseable mdc = MDC.putCloseable("userId", "gquintana")) {
  	demoLogger.info("Hello world!");
  }
  ----
  