code: func writeAlignedOptionDescriptors(w io.Writer, descriptors []*OptionDescriptor) error {
  	tw := tabwriter.NewWriter(w, 0, 4, 2, ' ', 0)
  
  	for _, desc := range descriptors {
  		fmt.Fprintf(tw, "%s\t%s\n", desc.Name, desc.Description)
  	}
  
  	if err := tw.Flush(); err != nil {
  		return err
  	}
  	return nil
  }
docs: // writeAlignedOptionDescriptors writes help entries for a series of Options.