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@ -32,7 +32,7 @@ pub unsafe trait Step: Clone + PartialOrd + Sized {
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/// * `steps_between(&a, &b) == Some(n)` only if `a <= b`
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/// * Corollary: `steps_between(&a, &b) == Some(0)` if and only if `a == b`
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/// * Note that `a <= b` does _not_ imply `steps_between(&a, &b) != None`;
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/// this is the case wheen it would require more than `usize::MAX` steps to get to `b`
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/// this is the case when it would require more than `usize::MAX` steps to get to `b`
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/// * `steps_between(&a, &b) == None` if `a > b`
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fn steps_between(start: &Self, end: &Self) -> Option<usize>;
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