DiffService: implement RawRangeDiff and RangeDiff
Looks like a tightening of previously used revspecs, more suitable for translation to Mercurial.
This instance will be upgraded to Heptapod 1.5.0rc (GitLab 16.11.1) on 2024-05-02 at 15:00 UTC+2
Looks like a tightening of previously used revspecs, more suitable for translation to Mercurial.