anchor.diff:  
   ["source","sh",subs="attributes,callouts"]
   ----------------------------------------------------------------------
  -sudo apt-get install openjdk-7-jre
  +sudo apt-get install openjdk-8-jre
   curl -L -O https://download.elastic.co/logstash/logstash/packages/debian/logstash-{LS-version}_all.deb
   sudo dpkg -i logstash-{LS-version}_all.deb
   ----------------------------------------------------------------------
  
positive.code: data, such as logs or decoded network packets.
  
  The binary packages of Elasticsearch have only one dependency: Java. The minimum
  supported version is Java 7. To download and install
  Elasticsearch, use the commands that work with your system
  (<<deb, deb>> for Debian/Ubuntu, <<rpm, rpm>> for Redhat/Centos/Fedora, <<mac,
  mac>> for OS X, and <<win, win>> for Windows):
  
negative.code: 
  ["source","sh",subs="attributes,callouts"]
  ----------------------------------------------------------------------
  sudo yum install java-1.8.0-openjdk
  curl -L -O https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/rpm/elasticsearch/{ES-version}/elasticsearch-{ES-version}.rpm
  sudo rpm -i elasticsearch-{ES-version}.rpm
  sudo service elasticsearch start
  