Closes#42191
This PR adds support for relative line numbers in deleted hunks. Note
that this only applies in cases where there is a form of relative
numbering.
It also adds some tests for this functionality as well as missing tests
for other cases in line layouting that was previously untested.
Release Notes:
- Line numbers will now be shown in deleted git hunks if relative line
numbering is enabled
Finn Evers
87d0401e64