$DIR/auxiliary/macro_name_span_helper.rs:
   LL|       |// edition: 2021
   LL|       |
   LL|       |#[macro_export]
   LL|       |macro_rules! macro_that_defines_a_function {
   LL|       |    (fn $name:ident () $body:tt) => {
   LL|      1|        fn $name () -> () $body
   LL|       |    }
   LL|       |}
   LL|       |
   LL|       |// Non-executable comment.

$DIR/macro_name_span.rs:
   LL|       |// edition: 2021
   LL|       |
   LL|       |// Regression test for <https://github.com/rust-lang/rust/issues/117788>.
   LL|       |// Under some circumstances, the heuristics that detect macro name spans can
   LL|       |// get confused and produce incorrect spans beyond the bounds of the span
   LL|       |// being processed.
   LL|       |
   LL|       |// aux-build: macro_name_span_helper.rs
   LL|       |extern crate macro_name_span_helper;
   LL|       |
   LL|      1|fn main() {
   LL|      1|    affected_function();
   LL|      1|}
   LL|       |
   LL|       |macro_rules! macro_with_an_unreasonably_and_egregiously_long_name {
   LL|       |    () => {
   LL|       |        println!("hello");
   LL|       |    };
   LL|       |}
   LL|       |
   LL|       |macro_name_span_helper::macro_that_defines_a_function! {
   LL|       |    fn affected_function() {
   LL|       |        macro_with_an_unreasonably_and_egregiously_long_name!();
   LL|       |    }
   LL|       |}