message: set bg on CircleOcticon
diff: @@ -6,9 +6,9 @@ import BorderBox from './BorderBox'
  function CircleOcticon(props) {
  const {size} = props
  - const {icon, ...rest} = props
  + const {icon, bg, ...rest} = props
  return (
  - <BorderBox overflow='hidden' border='none' size={size} borderRadius='50%'>
  + <BorderBox bg={bg} overflow='hidden' border='none' size={size} borderRadius='50%'>
  <Flex {...rest} alignItems="center" justifyContent="center">
  <Octicon icon={icon} size={size} />
  </Flex>
  