…-def, r=cjgillot

Recover upon mistyped error on typo'd `const` in const param def

And add machine-applicable fix for the typo'd `const` keyword.

### Before

```
error: expected one of `,`, `:`, `=`, or `>`, found `N`
 --> src/lib.rs:1:18
  |
1 | pub fn bar<Const N: u8>() {}
  |                  ^ expected one of `,`, `:`, `=`, or `>`
```

### After This PR

```
error: `const` keyword was mistyped as `Const`
 --> test.rs:1:8
  |
1 | fn bar<Const N: u8>() {}
  |        ^^^^^
  |
help: use the `const` keyword
  |
1 | fn bar<const N: u8>() {}
  |        ~~~~~

```

Fixes rust-lang#111941.

…fn, r=petrochenkov

Add details about `unsafe_op_in_unsafe_fn` to E0133

This was mentioned in rust-lang#99827 (comment)

…date, r=jackh726

compiler: update solaris/illumos to enable tsan support.

…lor-8, r=notriddle

Migrate GUI colors test to original CSS color format

Follow-up of rust-lang#111459.

r? `@notriddle`

Followup to rust-lang#111973

I somehow forgot to update the comment on `select_nth_unstable_by_key` in rust-lang#111973, so this PR fixes that.

r? `@Amanieu`