D9374: Highlighting indexer: report unused itemDatas and missing itemDatas

[Volker Krause]

vkrause accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R216 Syntax Highlighting

BRANCH
  FixMoreHls (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D9374

To: dhaumann, vkrause
Cc: #frameworks