Rollup merge of #93461 - dtolnay:fmtyield, r=davidtwco
Accommodate yield points in the format_args expansion
Fixes #93274.
For the case `println!("{} {:?}", "", async {}.await)` in the issue, the expansion before:
```rust
::std::io::_print(
::core::fmt::Arguments::new_v1(
&["", " ", "\n"],
&[
::core::fmt::ArgumentV1::new(&"", ::core::fmt::Display::fmt),
::core::fmt::ArgumentV1::new(&async {}.await, ::core::fmt::Debug::fmt),
],
),
);
```
After:
```rust
::std::io::_print(
::core::fmt::Arguments::new_v1(
&["", " ", "\n"],
&match (&"", &async {}.await) {
_args => [
::core::fmt::ArgumentV1::new(_args.0, ::core::fmt::Display::fmt),
::core::fmt::ArgumentV1::new(_args.1, ::core::fmt::Debug::fmt),
],
},
),
);
```
c1e2948c21