This is probably a trivial question. How exactly to you format an empty list in the railcraft.cfg? In the version I'm running, 1.10.2-10.2.0, I want to remove the fuel cost from the world spikes. The config file says,

if the list is empty, Worldspikes will not require fuel

How do you specify an empty list? Are these just multi-line strings, or proper lists? I'm not familiar with this file format and I can't find any information on it. It looks like a hybrid of JSON and INI, or similar to YAML. The file contains:

worldspikes {
    # ...
    fuel {
        # ...
        S:passive <
            railcraft:dust#0=2
            minecraft:ender_pearl=4
            railcraft:dust#6=8
            railcraft:dust#7=12
         >
        # ...

Do so:

S:passive <
>

On a side note, this cfg format is specified by forge.

Thanks.