Align SpacesVisitor#postVisit() with other formatting visitors

Using the root cursor is typically a bad idea, as it is globally shared in a recipe run.

rewrite-java/src/main/java/org/openrewrite/java/format/SpacesVisitor.java

@@ -1076,7 +1076,7 @@ public J.TypeParameter visitTypeParameter(J.TypeParameter typeParam, P p) {
     @Override
     public J postVisit(J tree, P p) {
         if (stopAfter != null && stopAfter.isScope(tree)) {
-            getCursor().getRoot().putMessage("stop", true);
+            getCursor().putMessageOnFirstEnclosing(JavaSourceFile.class, "stop", true);
         }
         return super.postVisit(tree, p);
     }