anchor.diff:  
   [source,sh]
   ---------------
  -./elasticsearch -Des.path.conf=/opt/elasticsearch/conf/test_node --node.name=test_node 
  +./elasticsearch -Des.path.conf=/opt/elasticsearch/conf/test_node --node.name=test_node
   ---------------
   
   for the flag to take effect.
  
positive.code: Instead, the config file must be named `elasticsearch.yml` and must be located
  in the default `config/` directory, or in the directory specified in the
  `CONF_DIR` environment variable.
  
negative.code: ==== Command line flags
  
  Command line flags using single dash notation must be now specified as the first arguments.
  For example if previously using:
  
  [source,sh]
  ---------------
  