
`compare_specs()` had a `colorful` keyword argument, but everything else in spack uses `color` for this. - [x] rename the argument - [x] make the default follow spack's `--color=always/never/auto` setting
`compare_specs()` had a `colorful` keyword argument, but everything else in spack uses `color` for this. - [x] rename the argument - [x] make the default follow spack's `--color=always/never/auto` setting