…deny]`/`#[forbid]` attributes

This fixes the overly-complex invariant mentioned in
<rust-lang#83237 (comment)>,
where the macro source can't have any links in it only because the
cache hasn't been populated yet.

The code for printing a raw path is only used in utils.rs,
which only prints the alternative (non-HTML) format. Path has
a function that does the same thing without HTML support,
so use that instead.

Do not ignore path segments in the middle in `#[allow]`/`#[warn]`/`#[deny]`/`#[forbid]` attributes

Fixes rust-lang#83477.

… r=jyn514

rustdoc: clean up and test macro visibility print

This fixes the overly-complex invariant mentioned in <rust-lang#83237 (comment)>, where the macro source can't have any links in it only because the cache hasn't been populated yet.

…t, r=petrochenkov

Builtin derive macros: fix error with const generics default

This fixes a bug where builtin derive macros (like Clone, Debug) would basically copy-paste the default from a const generic, causing a compile error with very confusing message - it would say defaults are not allowed in impl blocks, while pointing at struct/enum/union definition.

…-suggest, r=estebank

fix incomplete diagnostic notes when closure returns conflicting for genric type

fixes rust-lang#84128
Correctly report the span on for conflicting return type in closures

…anup, r=jyn514

rustdoc: get rid of unused path printing code

The code for printing a raw path is only used in utils.rs, which only prints the alternative (non-HTML) format. Path has
a function that does the same thing without HTML support, so use that instead.