maybe fix link

404.md

@@ -6,9 +6,9 @@ robots: noindex
 sitemap: false
 ---
 
-Sorry! We try to keep our links <a href='https://www.w3.org/Provider/Style/URI.html'>cool</a>.
+Sorry! We try to keep our links <a href="https://www.w3.org/Provider/Style/URI.html">cool</a>.
 
-If you think we broke a link, please <a href='{{ site.github.issues_url }}'>submit an issue or fix</a>.
+If you think we broke a link, please <a href="{{ site.github.repository_url }}">submit an issue or fix</a>.
 
 <script>
   var GOOG_FIXURL_LANG = (navigator.language || '').slice(0,2),GOOG_FIXURL_SITE = location.host;

_config.yml

@@ -9,3 +9,4 @@ od_current_version: '2.1'
 gems:
   - jekyll-sitemap
   - jekyll-redirect-from
+  - jekyll-github-metadata