Group and version can show blank even when not used

Testing Browse UI, I noticed that there was cases where the group and version showed blank even when not used. There's an acceptance criteria to 'Output "Zero with a slash" for unattached assets that we don't have version/group data on' but none for group or version.
I believe this was discussed in phone or hipchat however, so am making an improvement ticket.

Scenarios I noticed:

• Nuget items have no group but have no "Zero with a slash". Field currently displays blank.
• Raw items have no version but have no "Zero with a slash". Field currently displays blank.
• Raw items interestingly have group defined as /. I feel like this could potentially be "Zero with a slash" as well, but I may be missing a level of detail. Maybe / is useful?
• "-- Unattached Assets --" have no group or version but show blank. This is even weirder to me considering the criteria (stated above) says use it for the other fields.