loneElement: fix knownSize count
#340
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if the iterable can only be iterated once, the 'knownSize' will decrement on iteration, leading to errors like this: `Iterable was expected to have exactly one element, but it has 1`
maltek
approved these changes
Jul 11, 2025
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if the iterable can only be iterated once, the 'knownSize' will
decrement on iteration, leading to errors like this:
Iterable was expected to have exactly one element, but it has 1