test, adapt regressions for invert-match case

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, make invert-match logic in dgrep exactly the inverse of a match

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/dgrep'

* cmd/dgrep:
  minor, make invert-match logic in dgrep exactly the inverse of a match
  test, adapt regressions for invert-match case