run/diffcmd.go
func NewDiffCmd(releaseRepo pull.Release, release1, release2 string) *DiffCmd {
	return &DiffCmd{
		releaseRepo: releaseRepo,
		release1:    release1,
		release2:    release2,
	}
}
func NewDiffCmd(releaseRepo pull.Release, release1, release2 string) *DiffCmd {
	return &DiffCmd{
		releaseRepo: releaseRepo,
		release1:    release1,
		release2:    release2,
	}
}
// NewDiffCmd creates a new DiffCmd instance.