Bug: inconsistent input validation between spreadsheet and commandline functions

[pbeaucage]

The input validation stack between the spreadsheet and the command line do_rsoxs, do_nexafs functions appear to be different: polarizations=90 works in a spreadsheet but from command polarizations requires an Iterable such as a single-element list. It would provide a more consistent user experience to unify the input validation/cleanup code from rsoxs_scans such that the same parameters are accepted for both.

[EliotGann]

In principle I think this is right, however, do_rsoxs and do_nexafs are not ever suggested to be used in general. spreadsheets have a validation step which these commands do not. There is an expectation that if a user is running the commands directly they should know inputs rather than trusting the running code to clean it up as with spreadsheet input.

[EliotGann]

If they stick to the output of the columns from the OUTPUT spreadsheets, it should work perfectly