A batch YYYY_TEOS_XML_MMx can be split across zips that share
the YYYY_TEOS_XML_MM stem (e.g. 05A and 05B). Matching is on that stem
and ignores case (the IRS used 2024_TEOS_XML_04a).
Arguments
- batches
Character vector of
XML_BATCH_IDvalues.- zips
Output of
get_irs_zip_urls().