#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(debug_closure_helpers)]
use std::fmt;
fn main() {
    let value = 'a';
    assert_eq!(format!("{}", value), "a");
    assert_eq!(format!("{:?}", value), "'a'");
    let wrapped = fmt::from_fn(|f| write!(f, "{value:?}"));
    assert_eq!(format!("{}", wrapped), "'a'");
    assert_eq!(format!("{:?}", wrapped), "'a'");
}