Rust 1.67

Rust 1.67 was announced[0]. Update the necessary files for running
1.67 and fix the clippy suggestions for string interpolation.

[0]: https://blog.rust-lang.org/2023/01/26/Rust-1.67.0.html

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-httpd/src/api/axum_extra.rs

@@ -39,7 +39,7 @@ where
                     }
                     _ => Json(Error {
                         success: false,
-                        error: format!("{}", rejection),
+                        error: format!("{rejection}"),
                     }),
                 };
 
@@ -72,7 +72,7 @@ where
                     }),
                     _ => Json(Error {
                         success: false,
-                        error: format!("{}", rejection),
+                        error: format!("{rejection}"),
                     }),
                 };
 

radicle-httpd/src/lib.rs

@@ -254,7 +254,7 @@ async fn git_http_backend(
             Err(Error::Backend)
         }
         Err(err) => {
-            panic!("failed to wait for git-http-backend: {}", err);
+            panic!("failed to wait for git-http-backend: {err}");
         }
     }
 }