avoids invalid empty src
@ -43,7 +43,7 @@ class="notebook_app"
</span>
<span id="kernel_logo_widget">
<img class="current_kernel_logo" src=""/>
<img class="current_kernel_logo" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"/>
{% endblock headercontainer %}