Raise LookupError in partition_all when length is invalid
#603
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Sometimes an iterable's `__len__` is incorrect, which can lead to bad output from `partition_all`. We now raise an exception (when we previously output bad data) in these cases so the user can more easily find the invalid iterable and fix it. Fixes pytoolz#602.
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Sometimes an iterable's
__len__is incorrect, which can lead to bad output frompartition_all. This change ensurespartition_allchecks for this case and raise an exception (when it previously output bad data) so the user can more easily find the invalid iterable and fix it.Fixes #602. /cc @eriknw