Merge branch 'gh-pages' into refactoring

Author: bkhelifi

about.html

@@ -143,7 +143,6 @@ <h2 id="ackno"><a href="#ackno"> Acknowledgements </a></h2>
             and submitted bug reports. And we warmly thank all group leaders of the
             <a href="https://gammapy.org/team.html#support">supporting institutes</a>.
         </p>
-
         <p>We thank also the funding support from various entities:
             <ul>
             <li>the Spanish Ministry of Science and Innovation and the Spanish Research State Agency (AEI) under grant