Rollup merge of #113013 - fmease:rustdoc-decl-line-wrapping-slim-arg-list, r=camelid

rustdoc: get rid of extra line when line-wrapping fn decls with empty arg list

Fixes https://github.com/bevyengine/bevy/issues/8898#issuecomment-1605683417:

![Screenshot 2023-06-24 at 23-42-53 any_with_component in bevy_ecs schedule common_conditions - Rust](https://github.com/rust-lang/rust/assets/14913065/4646eba6-b186-4d78-96d9-aad716a4ef5d)

It now prints as shown below (which conforms to the style guide):

```rs
pub fn any_with_component<T: Component>(
) -> impl FnMut(Query<'_, '_, (), With<T>>) -> bool + Clone
```

The bug was introduced in #109011.

0 files changed, 0 insertions, 0 deletions