rpc: Format error with {:#}

Author: kvinwang

ra-rpc/src/rocket_helper.rs

@@ -248,7 +248,7 @@ impl<S> PrpcHandler<'_, '_, S> {
         match result {
             Ok(output) => output,
             Err(e) => {
-                let estr = format!("{e:?}");
+                let estr = format!("{e:#}");
                 warn!("error handling prpc: {estr}");
                 let body = encode_error(json, estr);
                 RpcResponse {