I re-verified that the git-tree state looks good after
the trouble addressed in commit 89023c38fc
(by the same approach - comparison to a "clean rebase").
I was actually a little surprised that simple git merge
did the right thing this time.
The one thing I can't fix is that some of staging commits are now
reachable from master even though they're not really applied in there
yet, but that's just temporary effect until the next merge to master.
I certainly don't envy any archeology hitting these commit ranges
(e.g. bisections).
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