anchor.diff:  --------------------------------------------------
   POST _ml/set_upgrade_mode?enabled=true
   --------------------------------------------------
  +// TEST
   +
   When you disable upgrade mode, the jobs resume using the last model state that 
   was automatically saved. This option avoids the overhead of managing active jobs 
  
positive.code: 
  GET _cat/recovery
  --------------------------------------------------
  --
  // tag::restart_ml[]
  . *Restart machine learning jobs.* (Optional)
  
negative.code: --------------------------------------------------
  POST _ml/set_upgrade_mode?enabled=false
  --------------------------------------------------
  // TEST[continued]
  
  If you closed all {ml} jobs before stopping the nodes, open the jobs and start 
  the datafeeds from {kib} or with the <<ml-open-job,open jobs>> and
  