Only dump with comments if using YAMLFormat.EXTENDED

src/main/java/com/sk89q/util/yaml/YAMLProcessor.java

@@ -75,6 +75,7 @@ public class YAMLProcessor extends YAMLNode {
     /* 
      * Map from property key to comment. Comment may have multiple lines that are newline-separated.
      * Comments support based on ZerothAngel's AnnotatedYAMLConfiguration
+     * Comments are only supported with YAMLFormat.EXTENDED
      */
     private final Map<String, String> comments = new HashMap<String, String>();
 
@@ -183,7 +184,7 @@ public class YAMLProcessor extends YAMLNode {
                 writer.append(header);
                 writer.append(LINE_BREAK);
             }
-            if (comments.size() == 0) {
+            if (comments.size() == 0 || format != YAMLFormat.EXTENDED) {
                 yaml.dump(root, writer);
             } else {
                 // Iterate over each root-level property and dump