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: editor.rs
    path of file: ./repos/diesel/examples/postgres/advanced-blog-cli/src
    
    the code of the file until where you have to start completion: use tempfile::NamedTempFile;

use std::error::Error;
use std::ffi::OsString;
use std::io::prelude::*;
use std::process::Command;

pub fn edit_string(s: &str) -> Result<String, Box<dyn Error>> {
    let mut file = NamedTempFile::new()?;
    file.write_all(s.as_bytes())?;
    editor_output(&mut file)
}

fn edi
    
fn editor_output(file: &mut NamedTempFile) -> Result<String, Box<dyn Error>> {
    let status = Command::new(editor_command()?)
        .arg(file.path().as_os_str())
        .spawn()?
        .wait()?;

    if !status.success() {
        return Err("Editor did not exit successfully. Aborting".into());
    }

    let mut buffer = String::new();
    file.rewind()?;
    file.read_to_string(&mut buffer)?;
    Ok(buffer)
}