Verify property parameter quoting is correct

[allenporter]

Is your feature request related to a problem? Please describe.

Right now property parameter quoting is ad-hoc based on if it is needed based on the contents of the value. Since the common values are URIs, they often require quoting anyway so it works. It would be better to explicitly test out quoted and unquoted property parameters since it seems to be required by the spec, so it mostly works now since uris have special chars -- seems better not to rely on that implicitly.