Review comment regarding Rc/etc.

Author: adetaylor

src/special-types-and-traits.md

@@ -12,22 +12,9 @@ defined types.
 * The [dereference operator] for `Box<T>` produces a place which can be moved
   from. This means that the `*` operator and the destructor of `Box<T>` are
   built-in to the language.
-* [Methods] can take `Box<Self>` as a receiver.
 * A trait may be implemented for `Box<T>` in the same crate as `T`, which the
   [orphan rules] prevent for other generic types.
 
-## `Rc<T>`
-
-[Methods] can take [`Rc<Self>`] as a receiver.
-
-## `Arc<T>`
-
-[Methods] can take [`Arc<Self>`] as a receiver.
-
-## `Pin<P>`
-
-[Methods] can take [`Pin<P>`] as a receiver.
-
 ## `UnsafeCell<T>`
 
 [`std::cell::UnsafeCell<T>`] is used for [interior mutability]. It ensures that
@@ -58,6 +45,9 @@ used as a method receiver; that is, the type of a `self` parameter for a
 method. There is a blanket implementation of `Receiver` for all `T: Deref`,
 so it's rare to implement `Receiver` directly: you'd only normally do this
 for smart pointer types which for some reason can't implement `Deref`.
+Built-in types which implement `Receiver` (via `Deref`) and are commonly
+used as method receivers include `Rc<T>`, `Arc<T>`, `Box<T>`, and `Pin<P>`
+where `P: Deref`.
 
 ## `Drop`