Minor tweaks to `flock` docs.
Minor tweaks to `flock` docs.

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