axum-core/macros: Change Display impl to match body_text() result (#3118)

Author: Turbo87

axum-core/CHANGELOG.md

@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # 0.5.0
 
+- **change:** The `Display` impl of all rejections generated by the
+  `define_rejection!()` will now include the `Display` output of the
+  inner error too. This matches the `body_text()` fn output now. ([#3118])
+
+[#3118]: https://github.com/tokio-rs/axum/pull/3118
+
 ## rc.1
 
 - **breaking:**: `Option<T>` as an extractor now requires `T` to implement the

axum-core/src/macros.rs

@@ -50,7 +50,7 @@ macro_rules! __define_rejection {
         impl $name {
             /// Get the response body text used for this rejection.
             pub fn body_text(&self) -> String {
-                $body.into()
+                self.to_string()
             }
 
             /// Get the status code used for this rejection.
@@ -107,7 +107,7 @@ macro_rules! __define_rejection {
 
             /// Get the response body text used for this rejection.
             pub fn body_text(&self) -> String {
-                format!(concat!($body, ": {}"), self.0).into()
+                self.to_string()
             }
 
             /// Get the status code used for this rejection.
@@ -132,7 +132,9 @@ macro_rules! __define_rejection {
 
         impl std::fmt::Display for $name {
             fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-                write!(f, "{}", $body)
+                f.write_str($body)?;
+                f.write_str(": ")?;
+                self.0.fmt(f)
             }
         }