Remove trailing whitespace in iter chain doc
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@ -12,7 +12,7 @@ use crate::usize;
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/// ```
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/// ```
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/// use std::iter::Chain;
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/// use std::iter::Chain;
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/// use std::slice::Iter;
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/// use std::slice::Iter;
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///
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///
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/// let a1 = [1, 2, 3];
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/// let a1 = [1, 2, 3];
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/// let a2 = [4, 5, 6];
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/// let a2 = [4, 5, 6];
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/// let iter: Chain<Iter<_>, Iter<_>> = a1.iter().chain(a2.iter());
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/// let iter: Chain<Iter<_>, Iter<_>> = a1.iter().chain(a2.iter());
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