Intra-doc link in core for a pointer method couldn't find Self

[scottmcm]

I had my PR fail (web) (plain) when I tried to use intra-doc links to link to a pointer method.

error: unresolved link to `Self::from_bits`
  --> library/core/src/ptr/const_ptr.rs:54:33
   |
54 |     /// The inverse method is [`Self::from_bits`].
   |                                 ^^^^^^^^^^^^^^^ no item named `Self` in scope

Opening a bug as requested in
https://rust-lang.zulipchat.com/#narrow/stream/266220-rustdoc/topic/Intra-doc.20links.20for.20pointers.3F/near/262639859

I particularly wanted intra-doc links here because there's #method.from_bits and #method.from_bits-1 on the page because of *const and *mut versions.

[jyn514]

I particularly wanted intra-doc links here because there's #method.from_bits and #method.from_bits-1 on the page because of *const and *mut versions.

FWIW I'm pretty sure intra-docs won't help with this, it assumes there's only of function of that name per item 🙃

[jyn514]

See also #80896 and #85960