[m-rev.] making costs uints

[Julien Fischer]

On Sun, 28 Dec 2025 at 17:25, Zoltan Somogyi <zoltan.somogyi at runbox.com>
wrote:

> Would anyone object if I changed the edit_seq and edit_distance
> modules in the library to represent costs using uints, instead of ints?
> It is a breaking change, but the fix is trivial, and it would enforce
> an invariant that both modules depend on.
>

No objections from me. It's only really a breaking change to edit_seq,
there hasn't
been a stable release featuring edit_distance.

Julien.
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