am 7fa4a21e: (-s ours) am 780c2372: accommodate both new and old target-files when creating incrementals (do not merge)

Merge commit '7fa4a21e1872e5ef2da12f00e77fa459c6c61c1c'

* commit '7fa4a21e1872e5ef2da12f00e77fa459c6c61c1c':
  accommodate both new and old target-files when creating incrementals (do not merge)