Perform line break only when there is a copyright banner

Author: squidfunk

material/partials/footer.html

@@ -42,8 +42,8 @@
           <span class="md-footer-copyright__highlight">
             {{ config.copyright }}
           </span>
+          <br>
         {% endif %}
-        <br>
         powered by
         <a href="http://www.mkdocs.org">MkDocs</a>
         and the

src/partials/footer.html

@@ -81,8 +81,8 @@
           <span class="md-footer-copyright__highlight">
             {{ config.copyright }}
           </span>
+          <br />
         {% endif %}
-        <br />
         powered by
         <a href="http://www.mkdocs.org">MkDocs</a>
         and the