
- [x] Add shell tests to ensure that `spack env activate`, `spack env deactivate`, and `despacktivate` continue to work. - [x] Also ensure that activate and deactivate both work with `set -u`
- [x] Add shell tests to ensure that `spack env activate`, `spack env deactivate`, and `despacktivate` continue to work. - [x] Also ensure that activate and deactivate both work with `set -u`