fix bug, reformat

Parser/spec/Helpers.jadd

 aspect Helpers {
 
-    public void ASTNode.checkTreeStructure() {
-        for (ASTNode child : astChildren()) {
-            if (child.getParent() != this) {
-                throw new RuntimeException();
-            }
-            child.checkTreeStructure();
-        }
+  public void ASTNode.checkTreeStructure() {
+    for (ASTNode child : this.astChildren()) {
+      if (child.getParent() != this) {
+        throw new RuntimeException();
+      }
+      child.checkTreeStructure();
     }
+  }
 
-    public void ASTNode.fixTreeStructure() {
-        for (ASTNode child : astChildren()) {
-            if (child.getParent() != this) {
-                // System.err.println("fixed parent of " + child);
-                child.parent = this;
-            }
-            child.fixTreeStructure();
-        }
+  public void ASTNode.fixTreeStructure() {
+    for (ASTNode child : this.astChildren()) {
+      if (child.getParent() != this) {
+        child.parent = this;
+      }
+      child.fixTreeStructure();
     }
+  }
 
 }