Looks like it is no longer necessary, as uninit_array() can be used
instead in the few cases where it was needed.

Without this, it was not inlined in SyncOnceCell::into_inner(), causing
unecessary checks and dead code.

This note is not relevant to other operating systems.

It took me quite some time to figure out what Span::to means.
A picture is worth a thousand words.

unions: test move behavior of non-Copy fields

This test ensures the behaviors suggested by @petrochenkov [here](#32836 (comment)).

Note that parallel-compiler = true causes tests to fail

Mentioning #75760.

…onas-schievink

Remove internal and unstable MaybeUninit::UNINIT.

Looks like it is no longer necessary, as `uninit_array()` can be used instead in the few cases where it was needed.

(I wanted to just add `#[doc(hidden)]` to remove clutter from the documentation, but looks like it can just be removed entirely.)

Simplify iter zip struct doc

…r=matklad

Simplify SyncOnceCell's `take` and `drop`.

Prevents copies by using `assume_init_read` and `assume_init_drop`.

Add mailmap entry

…=Mark-Simulacrum

Remove Windows details from Unix and VmWorks symlink() docstrings

This note is not relevant to other operating systems.

Simplify iter chain struct doc

slice::from_raw_parts: explicitly mention that data must be initialized

This reflects the status quo, until the discussion in rust-lang/unsafe-code-guidelines#77 reaches a conclusion.

Fix CI LLVM to work on NixOS out of the box

r? @Mark-Simulacrum

Tested locally, seems to work!

Add visualization of rustc span in doc

It took me quite some time to figure out what Span::to means.
A picture is worth a thousand words.

note that test_stable_pointers does not reflect a stable guarantee

Just to be sure...