message: pass display in as a prop
diff: @@ -2,7 +2,6 @@ import styled from 'styled-components'
  import Box from './Box'
  const ButtonGroup = styled(Box)`
  - display: inline-block;
  vertical-align: middle;
  & > * {
  @@ -36,7 +35,9 @@ const ButtonGroup = styled(Box)`
  }
  }
  `
  -
  +ButtonGroup.defaultProps = {
  + display: 'inline-block'
  +}
  ButtonGroup.propTypes = {
  ...Box.propTypes,
  }
  