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Rollup merge of #119205 - mumbleskates:vecdeque-comment-fix, r=Mark-Simulacrum

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fix minor mistake in comments describing VecDeque resizing

Avoiding confusion where one of the items in the deque seems to disappear in two of the three cases
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Matthias Krüger 2023-12-24 01:08:09 +01:00 committed by GitHub
commit 89c3236789
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1 changed files with 4 additions and 4 deletions
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library/alloc/src/collections/vec_deque/mod.rs
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@ -492,11 +492,11 @@ unsafe fn handle_capacity_increase(&mut self, old_capacity: usize) {
// L H // L H
// [o o o o o o o o ] // [o o o o o o o o ]
// H L // H L
// B [. . . o o o o o o o . . . . . . ] // B [. . . o o o o o o o o . . . . . ]
// L H // L H
// [o o o o o o o o ] // [o o o o o o o o ]
// L H // L H
// C [o o o o o . . . . . . . . . o o ] // C [o o o o o o . . . . . . . . o o ]
// can't use is_contiguous() because the capacity is already updated. // can't use is_contiguous() because the capacity is already updated.
if self.head <= old_capacity - self.len { if self.head <= old_capacity - self.len {