Rollup merge of #105682 - thomcc:expose-ptr-fmt, r=RalfJung

Use `expose_addr()` in `fmt::Pointer`

Discussion in https://rust-lang.zulipchat.com/#narrow/stream/136281-t-lang.2Fwg-unsafe-code-guidelines/topic/Should.20.60fmt.3A.3APointer.60.20expose.20the.20argument.3F on whether or not we should do this (still undecided).

CC `@RalfJung`

Author: Dylan-DPC

library/core/src/fmt/mod.rs

@@ -2471,8 +2471,8 @@ impl Display for char {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Pointer for *const T {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {
-        // Cast is needed here because `.addr()` requires `T: Sized`.
-        pointer_fmt_inner((*self as *const ()).addr(), f)
+        // Cast is needed here because `.expose_addr()` requires `T: Sized`.
+        pointer_fmt_inner((*self as *const ()).expose_addr(), f)
     }
 }