code: func (u *UI) BoldString(s string) string {
  	if !u.EnableColors {
  		return s
  	}
  
  	ctx := ansiterm.Context{
  		Styles: []ansiterm.Style{ansiterm.Bold},
  	}
  
  	return createStyledString(ctx, s)
  }
docs: // BoldString checks the EnableColors pref and returns a bolded copy
  // of the string (ANSI escape sequenced)