`mtl-2.3` needs a migration guide for removal of re-exports about mtl HOT 3 OPEN

@andreasabel It was not - I've commented on the original issue, and plan to issue a fix today.

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The changelog missing the relevant entry was indeed my bad, and I did fix it in #114. This does need to be updated on Hackage admittedly, but I believe that's a metadata change, so shouldn't require another release.

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but I believe that's a metadata change, so shouldn't require another release.

If you mean "metadata" in the sense of hackage, I am afraid the CHANGELOG isn't part of the metadata that can be modified. Only some contents of the .cabal file can be modified.

@kozross Could you please comment on whether the removal of ExceptT (also not mentioned in the CHANGELOG) was intentional?

• #117

If not, maybe you would anyway need a re-release.

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