The exact same background is already set for its parent, the `nav.sidebar`.

Hardcoded colors in rustdoc.css should usually be avoided.

When this line was added in 04b4c40, it
overrode a negative `margin-top` that was set on it by default.

https://github.com/rust-lang/rust/blob/04b4c40682c01cad8f9bc8d5b3907be91d6f81d4/src/librustdoc/html/static/rustdoc.css#L500-L516

That negative top margin was removed in
593d6d1.

…etroalbini

Remove let_underscore_must_use from list of uplifted lints

Per https://internals.rust-lang.org/t/rust-1-65-0-pre-release-testing/17660/2

We probably won't backport this (not worth rebuilding stable artifacts over it) but still should be fixed.

…sit, r=compiler-errors

Add visit_fn_ret_ty to hir intravisit

I'm working on some RPITIT changes and I need to specialize `visit_fn_ret_ty` in my visitor impl. So I guess it's better to land it separately.

r? `@compiler-errors`

…illaumeGomez

Properly render asyncness for trait fns without default body

We weren't properly desugaring async fns in traits unless they had default bodies (in which case rustdoc treats them much like they came from an impl).

cc ```@yoshuawuyts``` should help with https://rust-lang.zulipchat.com/#narrow/stream/330606-wg-async.2Fasync-fn-in-trait-impl/topic/type.20inside.20.60async.20fn.60.20body.20must.20be.20known.20in.20this.20context/near/306894869

…background, r=GuillaumeGomez

rustdoc: remove redundant mobile CSS `.sidebar-elems { background }`

The exact same background is already set for its parent, the `nav.sidebar`.

…=davidtwco

Add howto for adding new targets

When new targets are added, often a reviewer finds out that e.g. the target-3-tier-policy is not filled out (missing), there is no description etc.
This change adds a description of what I've learned while working on rust-lang#102701. It should make reviews easier in the future with less rework.

r? compiler-team

Improve use of ErrorGuaranteed and code cleanup

Part of rust-lang#103874

…jyn514

Move some tests from `src/test/ui` to more reasonable places

…-atop-lld, r=Mark-Simulacrum

Add note to RELEASES.md regarding issue 102754.

As discussed in [compiler triage meeting today](https://rust-lang.zulipchat.com/#narrow/stream/238009-t-compiler.2Fmeetings/topic/.5Bweekly.5D.202022-11-03/near/307746618); it would have been nice to get this in time for the stable notes, but having it only in nightly only is better than nothing...

r? `@Mark-Simulacrum`

…-border-bottom, r=GuillaumeGomez

rustdoc: clean up hardcoded CSS border color on search results

Hardcoded colors in rustdoc.css should usually be avoided.

Preview: http://notriddle.com/notriddle-rustdoc-demos/border-bottom-search/test_dingus/?search=test

…tem-info-margin-top, r=GuillaumeGomez

rustdoc: remove no-op CSS `#main-content > .item-info { margin-top: 0 }`

When this line was added in 04b4c40, it overrode a negative `margin-top` that was set on it by default.

https://github.com/rust-lang/rust/blob/04b4c40682c01cad8f9bc8d5b3907be91d6f81d4/src/librustdoc/html/static/rustdoc.css#L500-L516

That negative top margin was removed in 593d6d1.