Fix a bunch of typo

This PR will fix some typos detected by [typos].

I only picked the ones I was sure were spelling errors to fix, mostly in
the comments.

[typos]: https://github.com/crate-ci/typos

library/core/src/ptr/mut_ptr.rs

@@ -160,7 +160,7 @@ impl<T: ?Sized> *mut T {
     /// This is similar to `self as usize`, which semantically discards *provenance* and
     /// *address-space* information. However, unlike `self as usize`, casting the returned address
     /// back to a pointer yields [`invalid`][], which is undefined behavior to dereference. To
-    /// properly restore the lost information and obtain a dereferencable pointer, use
+    /// properly restore the lost information and obtain a dereferenceable pointer, use
     /// [`with_addr`][pointer::with_addr] or [`map_addr`][pointer::map_addr].
     ///
     /// If using those APIs is not possible because there is no way to preserve a pointer with the