anchor.diff:  
   [source,bash]
   ----
  -$ bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic test_topic
  +$ bin/kafka-topics.sh --zookeeper zkhost:2181 --describe --topic test_topic
   Topic:test_topic        PartitionCount:5        ReplicationFactor:2     Configs:
           Topic: test_topic       Partition: 0    Leader: 0       Replicas: 0,2   Isr: 0,2
           Topic: test_topic       Partition: 1    Leader: 2       Replicas: 2,3   Isr: 2,3
  
positive.code: {"version":1,"partitions":[{"topic":"test_topic","partition":0,"replicas":[3,0]},{"topic":"test_topic","partition":4,"replicas":[3,1]},{"topic":"__consumer_offsets","partition":0,"replicas":[0,1,2]},{"topic":"test_topic","partition":2,"replicas":[1,2]},{"topic":"test_topic","partition":3,"replicas":[2,3]},{"topic":"__consumer_offsets","partition":3,"replicas":[3,0,1]},{"topic":"__consumer_offsets","partition":4,"replicas":[0,2,3]},{"topic":"test_topic","partition":1,"replicas":[0,1]},{"topic":"__consumer_offsets","partition":1,"replicas":[1,2,3]},{"topic":"__consumer_offsets","partition":2,"replicas":[2,3,0]}]}
  ----
  
  Let's use the proposed reassignment plan, format it a bit to make it more readable,
  and save it in a `reassignment.json` file:
  
  [source,json]
  
negative.code:         Topic: test_topic       Partition: 4    Leader: 0       Replicas: 0,2   Isr: 0,2
  ----
  
  So we will have to redistribute partitions on the 4 nodes.
  In fact, our cluster has 2 topics:
  
  [source,bash]
  ----
  $ bin/kafka-topics.sh --zookeeper zkhost:2181 --list
  __consumer_offsets
  test_topic
  ----
  