Fix backup logic in filter_file
Fix backup logic in filter_file

krafczyk/spack,skosukhin/spack,tmerrick1/spack,LLNL/spack,mfherbst/spack,tmerrick1/spack,TheTimmy/spack,TheTimmy/spack,mfherbst/spack,TheTimmy/spack,LLNL/spack,TheTimmy/spack,lgarren/spack,krafczyk/spack,skosukhin/spack,LLNL/spack,lgarren/spack,tmerrick1/spack,EmreAtes/spack,iulian787/spack,EmreAtes/spack,tmerrick1/spack,TheTimmy/spack,iulian787/spack,lgarren/spack,matthiasdiener/spack,krafczyk/spack,EmreAtes/spack,matthiasdiener/spack,lgarren/spack,LLNL/spack,matthiasdiener/spack,krafczyk/spack,mfherbst/spack,krafczyk/spack,matthiasdiener/spack,iulian787/spack,mfherbst/spack,matthiasdiener/spack,EmreAtes/spack,tmerrick1/spack,lgarren/spack,skosukhin/spack,LLNL/spack,EmreAtes/spack,iulian787/spack,iulian787/spack,mfherbst/spack,skosukhin/spack,skosukhin/spack