minor: doc comment pat_util
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//! Pattern untilities.
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//!
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//! Originates from `rustc_hir::pat_util`
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use std::iter::{Enumerate, ExactSizeIterator};
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use std::iter::{Enumerate, ExactSizeIterator};
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pub(crate) struct EnumerateAndAdjust<I> {
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pub(crate) struct EnumerateAndAdjust<I> {
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