Fix bug with wrongly checking all files inside archive input #814
This is an embarrassing oversight on my part - i had swapped the places of the grep/map pair, grepping on perl objects, instead of the file name held by them.
That lead to archives with no TeX file from the arXiv corpus to be falsely searched through, and in fact often
An example directory tree I just tested with looks like:
As the authors used an encrypted
I'd appreciate a quick merge, would be happy to rerun the unexpected Fatals, which look to be largely due to this oversight. There may be other harder to detect cases of this, but they'll come to light in further reruns.