code: func FormatMap(m map[string]string) (fmtStr string) {
  	// output with keys in sorted order to provide stable output
  	keys := sets.NewString()
  	for key := range m {
  		keys.Insert(key)
  	}
  	for _, key := range keys.List() {
  		fmtStr += fmt.Sprintf("%v=%q\n", key, m[key])
  	}
  	fmtStr = strings.TrimSuffix(fmtStr, "\n")
  
  	return
  }
docs: // FormatMap formats map[string]string to a string.