Switch for -k|--diff doesn't seem to work

[dino-]

Maybe I'm doing it wrong but my workflow with aura for years has been to do -Ak PKG and inspect the PKGBUILD diffs. Since the 4.x versions (I think) I haven't seen this switch do anything, just quietly shows the pending new package version and asks for confirmation. The only way to see AUR PKGBUILD files any longer is to use -Ap which doesn't show diffs with the prior installation.