…ine with other descriptions.

add ticks around a few keywords in other descriptions.

Previously approved in rust-lang#43498 ; update tidy to match.

…owned() or "".into()

Found by clippy.

Window Mutex: Document that we properly initialize the SRWLock

See rust-lang#35836

Discourage overuse of mem::forget

Some uses of `mem::forget` have been replaced by better methods of `Box`, so I've removed obsoleted use-cases from these docs.

I've removed emphasis on leaking, because it's not obvious `mem::forget` does not guarantee leaking of memory: memory of stack-allocated objects and values partially moved out of `Box` will still be freed. That's a potential error when used to pass objects to FFI, so it's better to direct users to `Box::into_raw` instead.

…ennytm

add macro check for lint

Fixes rust-lang#53537

…nagisa

Lament the invincibility of the Turbofish

Here a test case is added to ensure that any others attempting to drive the Turbofish to extinction have second thoughts. Previously the [entire test suite would succeed](rust-lang#53511) if generic arguments were accepted without disambiguation, making for [confusing and heartbreaking circumstances](rust-lang/rfcs#2527).

use String::new() instead of String::from(""), "".to_string(), "".to_owned() or "".into()

docs: minor stylistic changes to str/string docs

std::string::String.repeat(): slightly rephrase to be more in-line with other descriptions.

add ticks around a few keywords in other descriptions.

…rk-Simulacrum

Update RELEASES.md to include clippy-preview

[Rendered](https://github.com/rust-lang/rust/blob/Aaronepower-patch-1/RELEASES.md#misc)

r? @Mark-Simulacrum

Fix a grammatical mistake in "expected generic arguments" errors

r? @eddyb

update nomicon and book

…, r=Mark-Simulacrum

tidy: Stop requiring a license header

Previously approved in rust-lang#43498 ; update tidy to match.

…tMisdreavus

Add missing fmt examples

r? @QuietMisdreavus

Prefer `.nth(n)` over `.skip(n).next()`.

Found by clippy.

…estebank

Use SmallVec for SmallCStr

This reuses the awesome optimizations from Servo's `SmallVec` to speed up `SmallCStr`.

Remove unnecessary closure in rustc_mir/build/mod.rs

Fixes rust-lang#53608

…ochenkov

Fix rust-lang#50865: ICE on impl-trait returning functions reaching private items

Adds a test case as suggested in rust-lang#50865, and implements @petrochenkov's suggestion. Fixes rust-lang#50865.

Impl-trait-returning functions are marked under a new (low) access level, which they propagate rather than `AccessLevels::Reachable`. `AccessLevels::is_reachable` returns false for such items (leaving stability analysis unaffected), these items may still be visible to the lints phase however.

…acrum

Added rustc_codegen_llvm to compiler documentation.

Fixes rust-lang#51737.