[clarfonthey]

r? libs

This re-commits #152972 but in a way where we can actually do FCP. It was reverted in #163752.

API stabilization:

impl<T, U, A> PartialEq<VecDeque<U, A>> for Vec<T, A>;
impl<T, U, A> PartialEq<VecDeque<U, A>> for &[T];
impl<T, U, A> PartialEq<VecDeque<U, A>> for &mut [T];
impl<T, U, A, const N: usize> PartialEq<VecDeque<U, A>> for [T; N];
impl<T, U, A, const N: usize> PartialEq<VecDeque<U, A>> for &[T; N];
impl<T, U, A, const N: usize> PartialEq<VecDeque<U, A>> for &mut [T; N];

[clarfonthey]

@rfcbot merge libs

[rust-rfcbot]

@clarfonthey has proposed to merge this. The next step is review by the rest of the tagged team members:

• @ChrisDenton
• @Mark-Simulacrum
• @cuviper
• @dtolnay
• @joshtriplett
• @nia-e
• @the8472
• @thomcc

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

cc @rust-lang/libs-ping: FCP proposed for libs, please feel free to register concerns.
See this document for info about what commands tagged team members can give me.

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.