Temp Fix For Edit This Page On ReactJs.org

MarkdownPage.js

{markdownRemark.fields.slug && (
  <div css={{marginTop: 80}}>
    <a
      css={sharedStyles.articleLayout.editLink}
      href={`https://github.com/reactjs/reactjs.org/tree/master/content/${
        markdownRemark.fields.slug.replace('.html', '.md')
      }`}>
      Edit this page
    </a>
  </div>
)}