Fails when using `#[doc = include_str!(...)]`

[Nemo157]

#[derive(displaydoc::Display)]
#[doc = include_str!("main.rs")]
pub struct Foo;

fn main() {
    println!("{}", Foo);
}

results in

   Compiling foo v0.1.0 (/tmp/tmp.0izm8rLLjV/foo)
error: expected literal
 --> src/main.rs:2:9
  |
2 | #[doc = include_str!("main.rs")]
  |         ^^^^^^^^^^^

error[E0277]: `Foo` doesn't implement `std::fmt::Display`
 --> src/main.rs:6:20
  |
6 |     println!("{}", Foo);
  |                    ^^^ `Foo` cannot be formatted with the default formatter
  |
  = help: the trait `std::fmt::Display` is not implemented for `Foo`
  = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
  = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0277`.
error: could not compile `foo` due to 2 previous errors

I'm not sure whether this is possible to support with the formatting support; without it you can just replicate the include_str!(...) call into the output code, but I assume formatting requires parsing the string to detect the formatted fields since unused fields are an error. This could potentially be detected and a better error message emitted though.