Co-Authored-By: Amanieu d'Antras <amanieu@gmail.com>

Crate name for rustc entry point docs changed. Fixes rust-lang#70603

add fn make_contiguous to VecDeque

Adds the following method to VecDeque:

```rust
pub fn make_contiguous(&mut self) -> &mut [T];
```

Taken from rust-lang#69400, after a suggestion by @CryZe rust-lang#69400 (comment)

I am in favor of merging this instead of rust-lang#69400.

…ie27

improve folder name for persistent doc tests

This fixes rust-lang#69411, by using the entire path as folder name and storing already visited paths in a HashMap + appending a number to the file name for duplicates.

Document ThreadSanitizer in unstable-book

…s, r=alexcrichton

Ensure there are versions of test code for aarch64 windows

Remove the `cfg` flags that were preventing some tests from running on `aarch64-pc-windows-msvc`.

All the existing `target_os = windows` targets had the same `align()` and `size()` values, so this change just removes the `target_arch` flags.

r? @alexcrichton

…an-DPC

Clean up E0466 explanation

r? @Dylan-DPC

…iser

remove unnecessary relocation check in const_prop

Unnecessary as per rust-lang#70356 (comment)

Fixes rust-lang#70356
r? @oli-obk Cc @wesleywiser

Fix broken link in README

Crate name for rustc entry point docs changed. Fixes rust-lang#70603