Update default value for 'format' to support 'hide_if_single_combination'
Update default value for 'format' to support 'hide_if_single_combination'

ultrabug/py3status,valdur55/py3status,ultrabug/py3status,tobes/py3status,vvoland/py3status,valdur55/py3status,tobes/py3status,valdur55/py3status,ultrabug/py3status,docwalter/py3status,Andrwe/py3status,alexoneill/py3status,Andrwe/py3status,guiniol/py3status,guiniol/py3status