Because it's one of the biggest sections.

This tweak to the function signature search engine makes things so that,
if a type is repeated in the search query, it'll only match if the
function actually includes it that many times.

…s, r=spastorino

Update names/comments for new return-position impl trait in trait lowering strategy

r? `@spastorino`

totally cosmetic

…-inlining, r=notriddle

rustdoc: Fix missing private inlining

Fixes rust-lang#109258.

If the item isn't inlined, it shouldn't have been added into `view_item_stack`. The problem here was that it was not removed, preventing sub items to be inlined if they have a re-export in "upper levels".

cc `@epage`
r? `@notriddle`

rustdoc: cleanup some intermediate allocs

First commit self contained, second one use `display_fn` for `extra_info_tags`

fix: fix ICE in `custom-test-frameworks` feature

Fixes rust-lang#107454

Simple fix to emit error instead of ICEing. At some point, all the code in `tests.rs` should be refactored, there is a bit of duplication (this PR's code is repeated five times over lol).

r? `@Nilstrieb` (active on the linked issue?)

…=notriddle

Add test for `c_variadic` in rustdoc-json

Helps with rust-lang#81359

…anonur

Ignore files in .gitignore in mir opt check

This caused `./x test tidy` to fail for me when Finder (macOS) added `.DS_Store` files. They are ignored by git, so tidy should ignore them, too.

…antics, r=GuillaumeGomez

rustdoc: implement bag semantics for function parameter search

This tweak to the function signature search engine makes things so that, if a type is repeated in the search query, it'll only match if the function actually includes it that many times.

Improve `Iterator::collect_into` documentation

This improves the examples in the documentation of `Iterator::collect_into`, replacing the usages of `println!` with `assert_eq!` as suggested on [IRLO](https://internals.rust-lang.org/t/18534/9).

…ary, r=notriddle

rustdoc: Remove footnote references from doc summary

Since it's one line, we don't have the footnote definition so it doesn't make sense to have the reference.

Part of rust-lang#109024.

r? `@notriddle`

…mpiler-errors

Fix wrong crate name in custom MIR docs

…, r=bjorn3

Split `items` from `-Zmeta-stats` in two.

Because it's one of the biggest sections.

r? `@bjorn3`

fix ClashingExternDeclarations lint ICE

Fixes rust-lang#109334

First "real" contribution, please let me know if I did something wrong.

As I understand it, it's OK if a `#[repr(transparent)]` type has no non-zero sized types (aka is a ZST itself) and the function should just return the type normally instead of panicking

r? `@Nilstrieb`

… r=jsha

rustdoc: Fix improper escaping of deprecation reasons

Fix rust-lang#109374

r? `@jsha`