change format to +

Author: yunheli

platform-yml-parser/src/main/java/com/flow/platform/yml/parser/exception/YmlException.java

@@ -22,10 +22,10 @@
 public class YmlException extends RuntimeException {
 
     public YmlException(String message) {
-        super(String.format("Illegal yml format: %s", message));
+        super("Illegal yml format: " + message);
     }
 
     public YmlException(String message, Throwable cause) {
-        super(String.format("Illegal yml format: %s", message), cause);
+        super("Illegal yml format: " + message, cause);
     }
 }