code: func appendLabelTabs(columnLabels []string) string {
  	var buffer bytes.Buffer
  
  	for i := range columnLabels {
  		// NB: This odd dance is to make the loop both compatible with go 1.3 and
  		// pass `gofmt -s`
  		_ = i
  		buffer.WriteString("\t")
  	}
  	buffer.WriteString("\n")
  
  	return buffer.String()
  }
docs: // Append a set of tabs for each label column.  We need this in the case where
  // we have extra lines so that the tabwriter will still line things up.