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Explicate what "Rc" and "Arc" stand for. #42419

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@@ -42,7 +42,8 @@ use heap::deallocate;
/// necessarily) at _exactly_ `MAX_REFCOUNT + 1` references.
const MAX_REFCOUNT: usize = (isize::MAX) as usize;

/// A thread-safe reference-counting pointer.
/// A thread-safe reference-counting pointer. 'Arc' stands for 'Atomically
/// Reference Counted'.
///
/// The type `Arc<T>` provides shared ownership of a value of type `T`,
/// allocated in the heap. Invoking [`clone`][clone] on `Arc` produces
@@ -10,7 +10,8 @@

#![allow(deprecated)]

//! Single-threaded reference-counting pointers.
//! Single-threaded reference-counting pointers. 'Rc' stands for 'Reference
//! Counted'.
//!
//! The type [`Rc<T>`][`Rc`] provides shared ownership of a value of type `T`,
//! allocated in the heap. Invoking [`clone`][clone] on [`Rc`] produces a new
@@ -266,7 +267,8 @@ struct RcBox<T: ?Sized> {
value: T,
}

/// A single-threaded reference-counting pointer.
/// A single-threaded reference-counting pointer. 'Rc' stands for 'Reference
/// Counted'.
///
/// See the [module-level documentation](./index.html) for more details.
///