Option to add divider above row instead of below

[userbox020]

thanks

[hugovk]

I think this would be useful.

Right now, table.add_row() has a divider=True attribute to add a one below.

Perhaps, instead of adding something like divider_above=True, we add something like plural dividers="above" / "below" / "both"? (Or an enumeration.)

And perhaps deprecate the existing divider?

[hugovk]

Although perhaps this is not so important now that https://github.com/prettytable/prettytable/issues/242 / https://github.com/prettytable/prettytable/pull/357 have added an add_divider() method to PrettyTable 3.14?