message: Added in the prior commit via the before event context.
diff: @@ -74,4 +74,5 @@ jobs:
  env:
  PT_BRANCH: ${{ github.event.pull_request.head.ref }}
  PT_COMMIT: ${{ github.event.pull_request.head.sha }}
  + PT_PRIOR_COMMIT: ${{ github.event.before }}
  GH_CONTEXT: ${{ toJSON(github) }}
  