let mutex_param = subst.type_at(0);
if let Some(atomic_name) = get_atomic_name(mutex_param) {
let msg = format!(
- "consider using an `{}` instead of a `Mutex` here; if you just want the locking \
- behavior and not the internal type, consider using `Mutex<()>`",
- atomic_name
+ "consider using an `{atomic_name}` instead of a `Mutex` here; if you just want the locking \
+ behavior and not the internal type, consider using `Mutex<()>`"
);
match *mutex_param.kind() {
ty::Uint(t) if t != ty::UintTy::Usize => span_lint(cx, MUTEX_INTEGER, expr.span, &msg),