fix typo
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@ -101,7 +101,7 @@ f :: SomeVal -> SomeVal -> SomeVal -> Either F'sExceptionType F'sResult
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```
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The problem is that these types don't unify. Also, it's commonly the case that
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we really don't need to about *why* a lookup failed, we just need to deal with
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we really don't need to know about *why* a lookup failed, we just need to deal with
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it. For those cases, `Maybe` is better.
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The solution to this is the `MonadThrow` typeclass from the exceptions package.
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