This allows keeping the setting to a fixed value without having to
toggle it when you want to work on the compiler instead of on tools.

Recent FreeBSD gdb packages have a different format for the version string.

Instead of producing `<span class=macro>assert_eq</span><span class=macro>!</span>`,
just produce `<span class=macro>assert_eq!</span>`.

…s output

Co-authored-by: Ralf Jung <post@ralfj.de>

…-Simulacrum

BTree: move blocks around in node.rs

Without changing any names or implementation, reorder some members:
- Move down the ones defined long ago on the demised `struct Root`, to below the definition of their current host `struct NodeRef`.
- Move up some defined on `struct NodeRef` that are interspersed with those defined on `struct Handle`.
- Move up the `correct_…` methods squeezed between the two flavours of `push`.
- Move the unchecked static downcasts (`cast_to_…`) after the upcasts (`forget_`) and the (weirdly named) dynamic downcasts (`force`).
r? ``@Mark-Simulacrum``

…k-Simulacrum

Add `download-rustc = "if-unchanged"`

This allows keeping the setting to a fixed value without having to
toggle it when you want to work on the compiler instead of on tools.

This sets `BOOTSTRAP_DOWNLOAD_RUSTC` in bootstrap.py so rustbuild doesn't have to try and replicate its logic.

Helps with rust-lang#81930.

r? ````@Mark-Simulacrum```` cc ````@camelid````

…check, r=Mark-Simulacrum

Fix error codes check run and ensure it will not go unnoticed again

Fixes rust-lang#83268.

The error codes explanations were not checked anymore. I fixed this issue and also added variables to ensure that this won't happen again (at least not silently).

Fix compiletest on FreeBSD

Recent FreeBSD gdb packages have a different format for the version string.

…ht, r=GuillaumeGomez

rustdoc: highlight macros more efficiently

Instead of producing `<span class=macro>assert_eq</span><span class=macro>!</span>`,
just produce `<span class=macro>assert_eq!</span>`.

…r=camelid

Remove unneeded INITIAL_IDS const

Some IDs inside this map didn't exist anymore, some others were duplicates of what we have inside `IdMap`. So instead of keeping the two around and since `INITIAL_IDS` was only used by `IdMap`, no need to keep both of them.

…order-shuffle, r=jyn514

List trait impls before deref methods in doc's sidebar

This PR is acting directly on a suggestion made by ```@jyn514``` in rust-lang#83133. I've tested the changes locally, and can confirm that it does in fact properly achieve what he thought it would. This PR also in turn closes rust-lang#83133.

…r=RalfJung

cleanup leak after test to make miri happy

Contains changes that were requested in rust-lang#83629 but didn't make it into the rollup.

r? ```@RalfJung```