You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test.rs
    path of file: ./repos/rust-gpu/crates/rustc_codegen_spirv/src/linker
    
    the code of the file until where you have to start completion: use super::{link, LinkResult};
use rspirv::dr::{Loader, Module};
use rustc_errors::registry::Registry;
use rustc_session::config::{Input, OutputFile
    
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        // HACK(eddyb) add extra newlines for readability when it shows up
        // in `Result::unwrap` panic messages specifically.
        f.write_str("\n")?;
        f.write_str(self)?;
        f.write_str("\n")
    }