slightly change error formatting

src/k2v-client/error.rs

@@ -5,7 +5,7 @@ use thiserror::Error;
 /// Errors returned by this crate
 #[derive(Error, Debug)]
 pub enum Error {
-	#[error("{0} {1}: {2} (at {3})")]
+	#[error("{0}, {1}: {2} (path = {3})")]
 	Remote(
 		http::StatusCode,
 		Cow<'static, str>,

src/k2v-client/lib.rs

@@ -332,7 +332,7 @@ impl K2vClient {
 							res.status,
 							"unknown".into(),
 							err_body_str.into(),
-							"".into(),
+							"?".into(),
 						),
 					};
 					return Err(err);