Fix indentation with JSX Fragments

[bertho-zero]

This PR fix an indentation issue with Fragment:

Before:

// in render method

{process.env.NODE_ENV === 'development'
&& typeof retry === 'function' ? (
  <>
      {' '}
      <button onClick={retry} type="button" className="btn btn-default">
      <FormattedMessage id="retry" defaultMessage="Retry" />
    </button>
    </>
  ) : null}

After:

{process.env.NODE_ENV === 'development'
&& typeof retry === 'function' ? (
  <>
    {' '}
    <button onClick={retry} type="button" className="btn btn-default">
      <FormattedMessage id="retry" defaultMessage="Retry" />
    </button>
  </>
  ) : null}

[ljharb]

Thanks!