Use of commas in GeoShape line example in Dataset guidelines

[ahayes]

Should there be commas in the GeoShape line example in the Dataset guidelines at https://github.com/ESIPFed/science-on-schema.org/blob/master/guides/Dataset.md ?
From looking at the other GeoShapes and the schema.org docs, it would seem that space delimited points are expected and points are (or can be?) themselves space delimited as they are in the other examples.

Anyway, I didn't have time to dig into it today but just noticed as I was reading through and wanted to note it where it wouldn't get forgotten.

[ashepherd]

Similar to #101 @ahayes I think its ambiguous, but the Google Dataset Search only shows the inset map if you use spaces, not commas.