matcher format for multiple sites share same definition

[sospartan]

I found put a space before comma will not parsed as two hosts, for example:

abc.com , ab.com {
...
}

Is this a reasonable format? I'd like make a PR about it. To quote the docs

If multiple sites share the same definition, you can list all of them together, either with spaces or commas.

Although the examples in the documentation are in the form of host immediately followed by a comma, this is, after all, not explicitly stated.