anchor.diff:  ----
   POST /kimchy/_flush/synced
   ----
  -// TEST[s/^/PUT kimchy\n/]
  +// TEST[skip: Synced flush can conflict with scheduled flushes in doc tests]
   
   
   [[synced-flush-api-multi-ex]]
  
positive.code: --------------------------------------------------
  GET /twitter/_stats?filter_path=**.commit&level=shards <1>
  --------------------------------------------------
  // TEST[s/^/PUT twitter\nPOST twitter\/_flush\/synced\n/]
  
  <1> `filter_path` is used to reduce the verbosity of the response, but is entirely optional
  
  
negative.code:    }
  }
  --------------------------------------------------
  // TEST[skip: Synced flush can conflict with scheduled flushes in doc tests]
  <1> the `sync id` marker
  
  NOTE: The `sync_id` marker is removed as soon as the shard is flushed again, and
  