Could we use a formatter for `.cabal` files in this project?

Could we use a formatter for `.cabal` files such as `cabal-fmt`? Nothing fancy, just a CI check to see that the `.cabal` files have been formated (by formatting again and checking for diffs).

I notice leading commas in `cabal-install-solver.cabal` and trailing commas in `cabal-install.cabal`.

https://github.com/haskell/cabal/blob/03d7b42a3f08bc1e6aa85118ca365277d8d83334/cabal-install-solver/cabal-install-solver.cabal#L101-L113

https://github.com/haskell/cabal/blob/03d7b42a3f08bc1e6aa85118ca365277d8d83334/cabal-install/cabal-install.cabal#L214-L245

Start with cabal-install-solver/cabal-install-solver.cabal and cabal-install/cabal-install.cabal, especially the referenced dependency sections, and review how this repository defines CI checks. Evaluate using cabal-fmt, then make CI format the .cabal files and fail when formatting produces diffs; done means the check covers the project files and catches the cited comma inconsistencies.

Written by the indexing model from the issue text.