Introducing appraisal2-rubocop
Appraisal2 RuboCop formats generated appraisal Gemfiles through Appraisal2 lifecycle hooks. It belongs in the generator bundle, where a modern RuboCop toolchain is available. The README distinguishes that environment from the older runtimes a library may test through its appraisals.
Read the upstream README for installation and usage, or browse the project repository.