Allow documentation to build in Python 3 (#5736)
Allow documentation to build in Python 3 (#5736)


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