Error tooltip wrapping at a weird spot

The line break before the backtick causes incorrect Markdown rendering.

The reason is that rust-analyzer responds with a \n before the backtick.

Steps to reproduce:

1. Create a new project with cargo new.
2. Rename src/main.rs with src/lib.rs.
3. Override the contents of the file with this.

code snippet to reproduce:

mod front_of_house {
    pub mod hosting {
        pub fn add_to_waitlist() {}
    }
}

mod customer {
    pub fn eat_at_restaurant() {
        hosting::add_to_waitlist();
    }
}

rust-analyzer version: 0.3.2743

rustc version: rustc 1.91.1 (ed61e7d7e 2025-11-07)

editor or extension: VSCode

Reproduce the tooltip issue in VSCode using a cargo new project, rename src/main.rs to src/lib.rs, and use the provided Rust snippet. Start by tracing how rust-analyzer's error response is rendered when it contains a newline before a backtick. Done means the tooltip wraps normally and the Markdown backtick renders correctly.