Merge branch 'stable-7.0'

* stable-7.0:
  DiffDriver: fix doc for rust built-in
  DiffDriver: fix formatting of javadoc
  Add numberOfObjectsSinceBitmap to RepoStatistics
  Support built-in diff drivers for hunk header function names
  Don't fail when trying to prune pack which is already gone
  Rename numberOfPackFilesAfterBitmap to numberOfPackFilesSinceBitmap

Change-Id: I98beec1186132e749a749706f399237de7d7e45e