| Each of these needs to be in a separate file, | |
| because the `span_delayed_bug` ICE in rustdoc won't be triggered | |
| if even a single other error was emitted. | |
| However, conceptually they are all testing basically the same thing. | |
| See https://github.com/rust-lang/rust/pull/73566#issuecomment-653689128 | |
| for more details. |