Improve fmt::Debug of Client and ClientBuilder

src/proxy.rs

@@ -48,7 +48,7 @@ use winreg::RegKey;
 /// # Ok(())
 /// # }
 /// ```
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct Proxy {
     intercept: Intercept,
 }
@@ -262,6 +262,12 @@ impl Proxy {
     }
 }
 
+impl fmt::Debug for Proxy {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_tuple("Proxy").field(&self.intercept).finish()
+    }
+}
+
 impl ProxyScheme {
     // To start conservative, keep builders private for now.