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generalize zip on empty lists hint #1565

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generalize zip on empty lists hint #1565

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jvoigtlaender
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Will the notEq x [] in the side condition work as intended, or is extra "escaping" of the list brackets necessary as in lhs and rhs?

@googleson78
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What's notEq?

@jvoigtlaender
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The hlint-internal side condition combinator that is already used at various other places in the same file.

@ndmitchell
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The notEq looks fine. However, you have also used isNonEmpty. As far as I can tell, that hasn't been in hlint for many years. Yes, there was a use of it. But no, it didn't do anything, so I've deleted it. Can you remove the isNonEmpty uses.

@jvoigtlaender
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Done.

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@jvoigtlaender @googleson78 @ndmitchell