> Let me restate the question.  When one has only the "new" file and
> the ed script that created it from the "old" one, and said script
> says "delete lines N through M", how does one recover the lines
> that were deleted? (With context or unified diffs, the deleted text
> is there.)

I don't think you can "reverse" the ed scripts produced with "diff -e",
unlike unified diff files.

However, in 9hist, the files are always reconstructed forward,
starting from the complete original file.

-- 
David du Colombier

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