message: Re-add top padding removed by `hide-readme-header`
diff: .repository-content #readme:not(.blob) .Box-header .btn-octicon:focus {
  opacity: 100%;
  }
  +
  +/* Restore spacing #3495 */
  +.repository-content #readme:not(.blob) .Box-body {
  + padding-top: 32px;
  +}
  