anchor.diff:  
   Because the split operation creates a new index to split the shards to,
   the <<create-index-wait-for-active-shards,wait for active shards>> setting
  -on index creation applies to the split index action as well.+on index creation applies to the split index action as well.
  
positive.code: 
  * Finally, it recovers the target index as though it were a closed index which
    had just been re-opened.
  
  [float]
  === Preparing an index for splitting
  
negative.code: properties of the default number of routing shards will then apply to the
  newly split index.
  
  [float]
  === How does splitting work?
  
  Splitting works as follows:
  
  