Auto merge of #3674 - sinkuu:fmt_rustup, r=oli-obk

Catch up with `format_args` change

Catches up with a change in rust-lang/rust#57537. (Since the optimization is optional, this clippy PR can be merged before the rustc PR.)

Happened to fix a bug in `expect_fun_call`, that is the lint ignores more than
one arguments to `format`.

```
warning: use of `expect` followed by a function call
 --> src/main.rs:2:17
  |
2 |     Some("foo").expect(format!("{} {}", 1, 2).as_ref());
  |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| panic!("{} {}", 1))`
  |
```

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