anchor.diff:  
   The following type parameters are deprecated for the `geo_shape` field type: `tree`,
   `precision`, `tree_levels`, `distance_error_pct`, `points_only`, and `strategy`. They
  -will be removed in a future version.+will be removed in a future version.
  +
  +[float]
  +[[breaking_66_ml_changes]]
  +=== Machine learning changes
  +
  +The get jobs API and get job stats API can retrieve a maximum of 10,000 jobs.
  +Likewise, the get datafeeds API and get datafeed stats API can retrieve a
  +maximum of 10,000 datafeeds. Prior to version 6.6, there were no limits on the
  +results from these APIs. 
  
positive.code: This section discusses the changes that you need to be aware of when migrating
  your application to Elasticsearch 6.6.
  
  * <<breaking_66_search_changes>>
  
  See also <<release-highlights>> and <<es-release-notes>>.
  
  
negative.code: `xpack.notification.slack.account.<id>.secure_url`
  
  [float]
  [[breaking_66_mapping_changes]]
  === Mappings changes
  
  [float]
  