allow blank footnote row in RTF output

[eanokian]

hi @kpagacz

I'm in a situation where I need to generate RTFs with a single blank/empty footnote when the TLG does not contain any footer, like this:

I think the way gentlg_single() is implemented right now doesn't allow for this behaviour. The exact line that prevents that is:

tidytlg/R/gentlg_single.R

Line 897 in efca3ef

dsnin <- huxtable::add_footnote(dsnin, paste0("\\line ", footer),

and

tidytlg/R/gentlg_single.R

Line 917 in efca3ef

paste0("<div style='border-top:1pt solid;'> ", "<br />", footer),

What I'm proposing is:

1. remove the "first" argument logic and just insert the footnotes as they come to the function.
2. users will need to pass footers = c("", ...) to gentlg() if they want the first empty line in the footer.

is this minor adjustment something you could consider? any drawbacks?