KLM confirms B787-9 converted to B787-10, delivery from 2020 onwards.
"KLM converted six of the 21 orders for the 787-9 Dreamliner version 787-10 . The first delivery is scheduled for 2020 KLM 787-10 ."
http://aeronews.ro/boeing-787-10-dreaml ... flota-klm/
KLM appears to have confirmed it via twitter:
http://twitter.com/KLM/status/633281225512341505