Use sys-apps/diffutils

Packages describing “diff” as local USE flag

Package “diff” Flag Description
dev-util/diffoscope Use sys-apps/diffutils
app-admin/puppet Enable diff support
dev-haskell/hashed-storage Provide the Storage.Hashed.Diff module.
dev-vcs/darcs Use 'lcs' for diff building.

All packages providing a “diff” USE flag (1)