anchor.diff:  BulkIndexByScrollResponse response = updateByQuery.get();
   --------------------------------------------------
   
  -`UpdateByQueryRequestBuilder` also allows you direct access to the query used
  -to select the documents which you can use to change the default scroll size or
  +`UpdateByQueryRequestBuilder` also enables direct access to the query used
  +to select the documents. You can use this access to change the default scroll size or
   otherwise modify the request for matching documents.
   
   [source,java]
  
positive.code: deleted. The deletion will be reported in the `deleted` counter in the
  <<docs-update-by-query-response-body, response body>>.
  
  Setting `ctx.op` to anything else is an error. Setting any
  other field in `ctx` is an error.
  
  This API doesn't allow you to move the documents it touches, just modify their
  source. This is intentional! We've made no provisions for removing the document
  from its original location.
  
  It's also possible to do this whole thing on multiple indexes and multiple
  types at once, just like the search API:
  
  [source,java]
  --------------------------------------------------
  
negative.code: BulkIndexByScrollResponse response = updateByQuery.get();
  --------------------------------------------------
  
  In addition to changing the `_source` field for the document, you can use a
  script to change the action, similar to the Update API:
  
  [source,java]
  --------------------------------------------------
  