To turn on preferred handling of spreadsheets as a policy which sets various attributes rather than strict adherence to the Excel / Spreadsheet::ParseExcel defaults.
I'm open to knowing if there are biases one way or another here. For now I think empty = undef rather than '' and skip empty cells are a good place to start. There is probably room for more than one flag.
To turn on preferred handling of spreadsheets as a policy which sets various attributes rather than strict adherence to the Excel / Spreadsheet::ParseExcel defaults.