am 71d4da49: am 207fadf6: am f41eb87d: am 6797b9fa: doc change: add diff report 4 -> 5

Merge commit '71d4da499a7cea2bb3bd3a6c1ed9e8e2b6b34ba8'

* commit '71d4da499a7cea2bb3bd3a6c1ed9e8e2b6b34ba8':
  doc change: add diff report 4 -> 5