Code cleanup and improvements.

ptlinux/depot.py

@@ -782,13 +782,15 @@ class DepotClient:
 		try:
 			response = self._opener(request, timeout=self.timeout_seconds)
 		except HTTPError as exc:
-			if exc.code == 416 and requested_offset:
+			status = exc.code
+			exc.close()
+			if status == 416 and requested_offset:
 				raise _RetryableDownloadError(
 					f"server rejected the saved offset for {file.path}",
 					discard_partial=True,
 				) from exc
 			raise _RetryableDownloadError(
-				f"HTTP {exc.code} from {server} for {file.path}"
+				f"HTTP {status} from {server} for {file.path}"
 			) from exc
 		except (OSError, HTTPException) as exc:
 			raise _RetryableDownloadError(