Resulting document list from `papis.cli.handle_doc_folder_query_sort` being sneakily mutated during iteration

[Enric Morales]

On papis@380e1f13:

During testing of papis/commands/rename.py, there's an iteration over the results of handle_doc_folder_query_sort. If we run() directly from cli(), the documents list will be mutating, possibly trying to execute run more than once for each document. A workaround was introduced in #810, which passes documents to another function which then calls run(). Somehow, this avoids the mutation.

It will be interesting to investigate why the list is mutating so that we can remove the workaround.