make About page's HTML more valid

diff --git a/about.html b/about.html
index e7bc384251b9236ac3425c6f8c5d4ce18011e857..4fb90f7139743e4d377c73445a83b865114c4046 100644 (file)
--- a/about.html
+++ b/about.html
@@ -28,22 +28,22 @@ base_url: "../"
   <p class="lead">Bootstrap is maintained by the founding team and a small group of invaluable core contributors, with the massive support and involvement of our community.</p>
   <div class="list-group bs-team">
     <a class="list-group-item team-member" href="https://github.com/mdo">
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=mdo&type=follow" width="120" height="20"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=mdo&amp;type=follow" width="120" height="20"></iframe>
       <img src="http://www.gravatar.com/avatar/bc4ab438f7a4ce1c406aadc688427f2c" alt="@mdo">
       <strong>Mark Otto</strong> <small>@mdo</small>
     </a>
     <a class="list-group-item team-member" href="https://github.com/fat">
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=fat&type=follow" width="120" height="20"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=fat&amp;type=follow" width="120" height="20"></iframe>
       <img src="http://www.gravatar.com/avatar/a98244cbdacaf1c0b55499466002f7a8" alt="@fat">
       <strong>Jacob Thornton</strong> <small>@fat</small>
     </a>
     <a class="list-group-item team-member" href="https://github.com/cvrebert">
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=cvrebert&type=follow" width="120" height="20"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=cvrebert&amp;type=follow" width="120" height="20"></iframe>
       <img src="http://www.gravatar.com/avatar/edec428c425453955f770095a7d26c50" alt="@cvrebert">
       <strong>Chris Rebert</strong> <small>@cvrebert</small>
     </a>
     <a class="list-group-item team-member" href="https://github.com/juthilo">
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=juthilo&type=follow" width="120" height="20"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=juthilo&amp;type=follow" width="120" height="20"></iframe>
       <img src="http://www.gravatar.com/avatar/0f7dd3ce58a416be5685ea6194f82b11" alt="@juthilo">
       <strong>Julian Thilo</strong> <small>@juthilo</small>
     </a>