Rollup merge of rust-lang#97565 - lukas-code:patch-1, r=thomcc

Add doc alias `memset` to `write_bytes`

I were looking for `memset` in rust, but the docs only pointed me to `slice::fill`.

With only the old aliases, one might write code like this, which is incorrect if the memory is uninitialized.
``` Rust
core::slice::from_raw_parts(ptr, len).fill(0)
```

Author: Dylan-DPC

library/core/src/intrinsics.rs

@@ -2287,6 +2287,7 @@ pub const unsafe fn copy<T>(src: *const T, dst: *mut T, count: usize) {
 /// // Now the box is fine
 /// assert_eq!(*v, 42);
 /// ```
+#[doc(alias = "memset")]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_const_unstable(feature = "const_ptr_write", issue = "86302")]
 #[inline]

library/core/src/ptr/mut_ptr.rs

@@ -1412,6 +1412,7 @@ impl<T: ?Sized> *mut T {
     /// See [`ptr::write_bytes`] for safety concerns and examples.
     ///
     /// [`ptr::write_bytes`]: crate::ptr::write_bytes()
+    #[doc(alias = "memset")]
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[rustc_const_unstable(feature = "const_ptr_write", issue = "86302")]
     #[inline(always)]