Pandoc Citeproc supports taking multiple bibliography files as input by passing a MetaList to the "bibliography" key instead of a single string. This keeps the original processPandocBiblio function taking a single bibliography, and adds a processPandocBiblios taking a list; the original function now just calls the new one.

It’ll take a list of bibliography items and generate filenames for them (just enumerating them) and then insert them all into the file tree, so it incidentally also replaces my previous PR too. :)

I hope this is useful to others, I thought it made sense to offer it rather than keep an entire copy of the function in my site.hs.

Still needs tests adding, which I’ll try to do shortly.