We have a logo in svg that scales nicely to large sizes, but by default
is only 5px large, i.e. very small. With the change the logo expands to
the full size. By only setting the height to 100% we ensure that the
width-height ratio isn't changed.

* The toggle adds visual clutter
* It's easy to miss that there are fields
* Tuple variant fields are always shown, so it is inconsistent to hide
  struct variant fields
* It's annoying to have to click the toggle every time

add test for issue 86507

add stderr for issue 86507

update issue-86507 UI test

add comment for the expected error in UI test file

add proper 'refers to <ref_type>' in suggestion

update diagnostic phrasing; update test to match new phrasing; re-organize logic for checking T: Sync

evaluate additional obligation to figure out if T is Sync

run './x.py test tidy --bless'

incorporate changes from review; reorganize logic for readability

memorialize Anna Harren in the bastion of the turbofish

this seems fitting, at least to me.

…send, r=estebank

fix: clarify suggestion that `&T` must refer to `T: Sync` for `&T: Send`

### Description

- [x] fix rust-lang#86507
- [x] add UI test for relevant code from issue
- [x] change `rustc_trait_selection/src/traits/error_reporting/suggestions.rs` to include a more clear suggestion when `&T` fails to satisfy `Send` bounds due to the fact that `T` fails to implement `Sync`

…meGomez

Don't hide fields of enum struct variants

* The toggle adds visual clutter
* It's easy to miss that there are fields
* Tuple variant fields are always shown, so it is inconsistent to hide
  struct variant fields
* It's annoying to have to click the toggle every time

…=jyn514

Make `x.py d` an alias for `x.py doc`

In rust-lang/cargo#9680, `d` was added to Cargo as an alias for `doc`. This PR adds the same alias to `x.py`. The same considerations of convenience that applied to Cargo also apply to `x.py`, and in any case, the two should be kept symmetrical.

…, r=jyn514

Move calls to test_main into one function

Fixes rust-lang#86254.

cc `@jyn514`
r? `@camelid`

Extend HIR WF checking to fields

r? `@estebank`

…=GuillaumeGomez

Change rustdoc logo to use the full container size

We have a logo in svg that scales nicely to large sizes, but by default
is only 5px large, i.e. very small. With the change the logo expands to
the full size. By only setting the height to 100% we ensure that the
width-height ratio isn't changed.

…sts, r=oli-obk

Add regression tests for the impl_trait_in_bindings ICEs

Closes rust-lang#54600, closes rust-lang#54840, closes rust-lang#58504, closes rust-lang#58956, closes rust-lang#70971, closes rust-lang#79099, closes rust-lang#84919, closes rust-lang#86201, closes rust-lang#86642, closes rust-lang#87295

r? `@oli-obk`