|  | error: invalid format string: raw identifiers are not supported | 
|  | --> tests/ui/raw-identifier.rs:4:18 | 
|  | | | 
|  | 4 | #[error("error: {r#fn}")] | 
|  | |                  --^^ | 
|  | |                  | | 
|  | |                  raw identifier used here in format string | 
|  | |                  help: remove the `r#` | 
|  | | | 
|  | = note: identifiers in format strings can be keywords and don't need to be prefixed with `r#` | 
|  |  | 
|  | error: invalid format string: raw identifiers are not supported | 
|  | --> tests/ui/raw-identifier.rs:11:30 | 
|  | | | 
|  | 11 |     let _ = format!("error: {r#fn}"); | 
|  | |                              --^^ | 
|  | |                              | | 
|  | |                              raw identifier used here in format string | 
|  | |                              help: remove the `r#` | 
|  | | | 
|  | = note: identifiers in format strings can be keywords and don't need to be prefixed with `r#` |