added custom Debug implementation for ClientWithMiddleware, skipping middleware_stack field (#22)

reqwest-middleware/src/client.rs

@@ -3,7 +3,7 @@ use reqwest::multipart::Form;
 use reqwest::{Body, Client, IntoUrl, Method, Request, Response};
 use serde::Serialize;
 use std::convert::TryFrom;
-use std::fmt::Display;
+use std::fmt::{self, Display};
 use std::sync::Arc;
 use std::time::Duration;
 use task_local_extensions::Extensions;
@@ -138,6 +138,15 @@ impl From<Client> for ClientWithMiddleware {
     }
 }
 
+impl fmt::Debug for ClientWithMiddleware {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        // skipping middleware_stack field for now
+        f.debug_struct("ClientWithMiddleware")
+            .field("inner", &self.inner)
+            .finish()
+    }
+}
+
 /// This is a wrapper around [`reqwest::RequestBuilder`] exposing the same API.
 #[must_use = "RequestBuilder does nothing until you 'send' it"]
 pub struct RequestBuilder {