anchor.diff:  // TEST[setup:stackoverflow]
   
   [float]
  +[[breaking_66_setting_changes]]
   === Settings changes
   
   [float]
  
positive.code: 
  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.
negative.code: This section discusses the changes that you need to be aware of when migrating
  your application to Elasticsearch 6.6.
  
  * <<breaking_66_ml_changes>>
  * <<breaking_66_mapping_changes>>
  * <<breaking_66_search_changes>>
  * <<breaking_66_setting_changes>>
  
  See also <<release-highlights>> and <<es-release-notes>>.
  
  