vfp2csv does not handle multiple instances of vfp keywords

[larsevj]

In vfpfile2df in vfp2csv.py you have the following lines:

    print(f" - found {len(vfpstartindices)} vfp keywords")
    for vfptableidx in vfpstartindices:

however the function returns bhp_values_stacked which is created inside the loop and so if len(vfpstartindices) >1 you will still only get the result of the last vfp instance.

Is it common to have multiple tables in the same file? Can you have tables of different types within the same file? What is the intended behaviour? The tests do not really tell much as they all only have one instance of type VFPPROD..