photomet MinnaertEmpirical will not work with certain formats of pvl input

[krlberry]

ISIS version(s) affected: all ISIS3 versions

Description
photomet will fail when used with the frompvl parameter and model=MinneartEmpirical if the pvl specified was of the format has keywords of the form:
PvlKeyword = (1,2,3,3,4) rather than PvlKeyword="1,2,3,4"

This is technically documented at: https://isis.astrogeology.usgs.gov/Application/presentation/Tabbed/photomet/photomet.html
but it is easy to generate output of the unsupported format using photemplate, and the unsupported format is the more standard format for multi-value keywords in ISIS, so it should be supported.

How to reproduce
Run photomet using model='MinneartEmpiricall and provide a pvl file with any of the PvlKeywords: PhaseList, KList, or PhaseCurveListset to a series of values formatted as:
PvlKeyword = (1,2,3,3,4)

Possible Solution
Same solution as #3614

Additional context
Noticed that the failure mode reported in #3608 affects MinneartEmpirical as well after the sprint's completion.

[rbeyer]

FYI, since I've lately been deep in reading the 'standards' for PVL, it is important to note that this construction: PvlKeyword="1,2,3,4", is a PVL Quoted String assignment statement whereas this construction: PvlKeyword=(1,2,3,4), is a PVL Sequence assignment statement. So in the first case, a standards-compliant PVL parser would assign the value 1,2,3,4 to a string variable, whereas the second would assign the four values to a list or array of the appropriate numerical type, depending on the programming language and the parser.

Both are 'valid' PVL, I suppose, but if this keyword is always going to be a list of numbers, where the order is important, and access to the individual values is relevant, then it really should be constructed as a PVL Sequence, so that PVL parsers can parse and validate the values correctly. Otherwise, you would need some other code to convert the string to a list of numbers and validate that it went correctly, which seems like double the work.

However, I guess that 'double work' is already being done if this program works with the PVL Quoted String construction and not the PVL Sequence construction. It is odd that it was implemented that way.

[ascbot]

I am a bot that cleans up old issues that do not have activity.

This issue has not received feedback in the last six months. I am going to add the inactive label to
this issue. If this is still a pertinent issue, please add a comment or add an emoji to an existing comment.

I will post again in five months with another reminder and will close this issue on it's birthday unless it has
some activity.

[krlberry]

This is still an issue.

[github-actions]

Thank you for your contribution!

Unfortunately, this issue hasn't received much attention lately, so it is labeled as 'stale.'

If no additional action is taken, this issue will be automatically closed in 180 days.

[github-actions]

Thank you for your contribution!

Unfortunately, this issue hasn't received much attention lately, so it is labeled as 'stale.'

If no additional action is taken, this issue will be automatically closed in 180 days.

[rbeyer]

Still relevant.