fix jinja2 string whoes

templates/index.html

@@ -14,7 +14,7 @@
 		   {% if storages[row][column].needs_processing %}border: 2px red solid;{% endif %};">
 	  <div>{{row}}{{column}}</div>
 	  <div>{{ storages[row][column].size }}</div>
-	  <a href="{{ url_for("get_storage", storage_name=f"{row}{column}") }}" class="stretched-link"></a>
+	  <a href="{{ url_for('get_storage',storage_name=row+(column|string)) }}" class="stretched-link"></a>
 	</td>
       {% endfor %}
     {% endfor %}