Add line-through on deleted branches in PRs

[rahgurung]

Only colon is line-throughed here.

Link to PR in screenshot: #2233

[fregante]

Thanks for the report!

It’s a duplicate of #1985

I hope someone sends a PR soon ☺️

[fregante]

Reopening because now this needs to be re-implemented as its own feature: cross-deleted-pr-branches

Most of the logic is in cb8de12 (removed) but now we only need to use the part that adds the strike-through, not the linkifier.

The feature could also point the link to the repo root (instead of the 404 deleted branch) to make it somewhat useful.

[rahgurung]

The feature could also point the link to the repo root (instead of the 404 deleted branch) to make it somewhat useful.

Forked repo root or the primary repo?

[fregante]

The head branch could either be from the same repo or from a fork. I think it would only make sense to point to the fork’s default branch and do nothing if it’s the same repo.