Mix format

Author: vtm9

services/app/apps/codebattle/lib/codebattle_web/templates/layout/app.html.heex

@@ -345,7 +345,12 @@
               role="alert"
             >
               {message}
-              <button type="button" class="close text-white" data-dismiss="alert" aria-label="Close">
+              <button
+                type="button"
+                class="close text-white"
+                data-dismiss="alert"
+                aria-label="Close"
+              >
                 <span aria-hidden="true">&times;</span>
               </button>
             </div>