Felipe Contreras [off-list ref] writes:

It is not a complete solution, but should improve the current situation.

Since v2:

1. The warning is updated to say "a merge, a rebase, or a fast-forward"
2. A suggestion 'If unsure, run "git pull --merge".' is removed
3. A new REBASE_DEFAULT is introduced
4. Tests are revamped using helpers
5. The logic of --merge and --ff-only is updated so one can override the other
6. A bunch of commit messages are updated
7. A memory inconsistency is fixed

On what base has this series been built?  Applying to 'master' seems
to stop at the "refactor fast-forward check" step.