Fix some missing string to json

Author: henryju

org.eclipse.lsp4j.jsonrpc/src/main/java/org/eclipse/lsp4j/jsonrpc/TracingMessageConsumer.java

@@ -134,7 +134,7 @@ private String consumeMessageSending(Message message, Instant now, String date)
 			String id = responseMessage.getId();
 			RequestMetadata requestMetadata = receivedRequests.remove(id);
 			if (requestMetadata == null) {
-				LOG.log(WARNING, String.format("Unmatched response message: %s", message));
+				LOG.log(WARNING, String.format("Unmatched response message: %s", jsonHandler.toString(message)));
 				return null;
 			}
 			String method = requestMetadata.method;
@@ -152,7 +152,7 @@ private String consumeMessageSending(Message message, Instant now, String date)
 			String format = "[Trace - %s] Sending notification '%s'\nParams: %s\n\n\n";
 			return String.format(format, date, method, paramsJson);
 		} else {
-			LOG.log(WARNING, String.format("Unknown message type: %s", message));
+			LOG.log(WARNING, String.format("Unknown message type: %s", jsonHandler.toString(message)));
 			return null;
 		}
 	}
@@ -192,7 +192,7 @@ private String consumeMessageReceiving(Message message, Instant now, String date
 			String format = "[Trace - %s] Received notification '%s'\nParams: %s\n\n\n";
 			return String.format(format, date, method, paramsJson);
 		} else {
-			LOG.log(WARNING, String.format("Unknown message type: %s", message));
+			LOG.log(WARNING, String.format("Unknown message type: %s", jsonHandler.toString(message)));
 			return null;
 		}
 	}