code: func (t Targets) IsLess(o Targets) bool {
  	if len(t) < len(o) {
  		return true
  	}
  	if len(t) > len(o) {
  		return false
  	}
  
  	sort.Sort(t)
  	sort.Sort(o)
  
  	for i, e := range t {
  		if e != o[i] {
  			return e < o[i]
  		}
  	}
  	return false
  }
docs: // IsLess should fulfill the requirement to compare two targets and chosse the 'lesser' one.
  // In the past target was a simple string so simple string comparison could be used. Now we define 'less'
  // as either being the shorter list of targets or where the first entry is less.
  // FIXME We really need to define under which circumstances a list Targets is considered 'less'
  // than another.