Silent failure if space in name

[timkpaine]

c.JupyterFs.resources = [{
    "name": "homedir fsspec",
    "type": "fsspec",
    "url": "file:///Users/timkpaine/Developer/projects/painebot/jupyter-fs",
}]

[MITHRADEVI-K]

Hi @timkpaine 👋,

Thanks for opening this issue. I'm interested in contributing a fix for the space-handling bug.