Semi-automatic update. These checks were performed:
- built on NixOS
- found 6.0.1 with grep in /nix/store/bi514yar6zzf7i7c78ndlha1pba51ld2-pmd-6.0.1
- found 6.0.1 in filename of file in /nix/store/bi514yar6zzf7i7c78ndlha1pba51ld2-pmd-6.0.1
* Remove package name
* Start with upper case letter
* Remove trailing period
Also reword some descriptions and move some long descriptions to
longDescription.
I'm not touching generated packages.