This lets us put a version on the impl, too.

…m-ou-se

Improve docs for impl Default for ExitStatus

This addresses a review comment in rust-lang#106425 (which is on the way to being merged I think).

Some of the other followup work is more complicated so I'm going to do individual MRs.

~~Note this branch is on top of rust-lang#106425~~

Fix pthread_attr_union layout on Wasi

Fixes rust-lang#114608

Ran the tests as described in https://github.com/rust-lang/rust/blob/master/src/doc/rustc/src/platform-support/wasm32-wasi-preview1-threads.md?plain=1#L125

Point out expectation even if we have `TypeError::RegionsInsufficientlyPolymorphic`

just a minor tweak, since saying "one type is more general than the other" kinda sucks if we don't actually point out two types.

…r=cuviper

Optimizing the rest of bool's Ord implementation

After coming across issue rust-lang#66780, I realized that the other functions provided by Ord (`min`, `max`, and `clamp`) were similarly inefficient for bool. This change provides implementations for them in terms of boolean operators, resulting in much simpler assembly and faster code.
Fixes issue rust-lang#114653

[Comparison on Godbolt](https://rust.godbolt.org/z/5nb5P8e8j)

`max` assembly before:
```assembly
example::max:
        mov     eax, edi
        mov     ecx, eax
        neg     cl
        mov     edx, esi
        not     dl
        cmp     dl, cl
        cmove   eax, esi
        ret
```
`max` assembly after:
```assembly
example::max:
        mov     eax, edi
        or      eax, esi
        ret
```
`clamp` assembly before:
```assembly
example::clamp:
        mov     eax, esi
        sub     al, dl
        inc     al
        cmp     al, 2
        jae     .LBB1_1
        mov     eax, edi
        sub     al, sil
        movzx   ecx, dil
        sub     dil, dl
        cmp     dil, 1
        movzx   edx, dl
        cmovne  edx, ecx
        cmp     al, -1
        movzx   eax, sil
        cmovne  eax, edx
        ret
.LBB1_1:
        ; identical assert! code
```
`clamp` assembly after:
```assembly
example::clamp:
        test    edx, edx
        jne     .LBB1_2
        test    sil, sil
        jne     .LBB1_3
.LBB1_2:
        or      dil, sil
        and     dil, dl
        mov     eax, edi
        ret
.LBB1_3:
        ; identical assert! code
```

…provement, r=notriddle

Improve code readability by moving fmt args directly into the string

There are some of occurrences where I also transformed `write!(f, "{}", x)` into `f.write_str(x.as_str())`.

r? `@notriddle`

Fix typos

add missing feature(error_in_core)

Needed to fix feature gate errors in https://github.com/rust-lang/miri-test-libstd/actions/runs/5862810459/job/15895203359. I don't know how doctests are passing in-tree without this feature gate...

…lor-33, r=notriddle

Migrate GUI colors test to original CSS color format

Follow-up of rust-lang#111459.

r? ```@notriddle```

fix typo: affect -> effect

I just realized I made a silly typo when writing that comment...