… in compare mode chalk don't finish.

…ant in the language.

(Note that the fact this test existed is a slight sign that we may need a crater
run on this bugfix...)

That is, this changes `#[forbid(foo)] #[allow(foo)]` from allowing foo to
forbidding foo.

…hewjasper

Add check for doc alias attribute at crate level

Fixes #76298, #64734, #69365.

r? @ollie27

core::global_allocator docs link to std::alloc::GlobalAlloc

Closes #77100

…=Mark-Simulacrum

BTreeMap: admit the existence of leaf edges in comments

The btree code is ambiguous about leaf edges (i.e., edges within leaf nodes). Iteration relies on them heavily, but some of the comments suggest there are no leaf edges (extracted from #77025)

r? @Mark-Simulacrum

Include scope id in SocketAddrV6::Display

r? @tmandry

I couldn't find any unit tests for these functions.

cc @ghanan94 @brunowonka

BTreeMap: refactoring around edges, missed spots

Tweaks from #77244 (and more) that are really inconsistencies in #77005.

r? @Mark-Simulacrum

Update to chalk 0.31

Gonna assign @nikomatsakis to the review here, but since he is pretty busy recently, if anyone else wants to review this, that would be much appreciated.

r? @nikomatsakis

Avoid unchecked casts in net parser

Once this and #77426 are in, I'll send another PR adding scope id parsing.

r? @dtolnay

…e-forbid-in-same-scope, r=petrochenkov

Disallow overriding forbid in same scope

Rebased #73379.

Fixes #70819.