environment: fixed comment and default separator
environment: fixed comment and default separator

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