Sparked by Confused over an edit rejection / https://stackoverflow.com/review/suggested-edits/1884717

Currently, in a diff, it is hard to see where links have been added unless you jiggle your mouse around in the general area. This leads to edit rejections like the one linked to above. I agree that reviewers should really be spending more time on a post, but since that's much harder to fix, this seems like an alternative to patch up the issues with links.

Besides, one shouldn't have to wave their mouse around to see where links were added (sure, the markdown diff exists, but it would be nice if link changes were apparent in the main diff as well)

Could this be changed so that links which are red/green highlighted have a dark blue underline?

Something like

a .diff-add, a.diff-delete{border-bottom: 1px solid blue;}