Rollup merge of #126187 - surechen:fix_125997, r=oli-obk

For E0277 suggest adding `Result` return type for function when using QuestionMark `?` in the body.

Adding suggestions for following function in E0277.

```rust
fn main() {
    let mut _file = File::create("foo.txt")?;
}
```

to

```rust
fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut _file = File::create("foo.txt")?;

    return Ok(());
}
```

According to the issue #125997, only the code examples in the issue are targeted, but the issue covers a wider range of situations.

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