anchor.diff:  Change any use of `-1` as `from` parameter in request body or url parameters by either
   setting it to `0` or omitting it entirely. Requests containing negative values will
   return an error.
  -====+====
  
positive.code: //Installation and Upgrade Guide
  
  //tag::notable-breaking-changes[]
  //end::notable-breaking-changes[]
  
  .Search-related REST API endpoints containing mapping types have been removed.
  
negative.code: GitHub or the 'discuss' forums.
  
  *Impact* +
  Discontinue use of the `sparse_vector` field data type. Requests containing
  a mapping for this field data type will return an error.
  ====
  
  