### Godot version

3b086aa06

### System information

ArchLinux x11

### Issue description

```gdscript
extends Node

@export_group("My Properties")
@export var number = 3
@export var string = ""

@export_group("Prefixed Properties", "prefix_")
@export var prefix_number = 3
@export var prefix_string = ""

@export_group("", "")
@export var ungrouped_number = 3
```

![image](https://user-images.githubusercontent.com/70787919/214983963-528c415b-745b-47fc-9777-36ebe31a3060.png)


### Steps to reproduce

- create script
- @export_group
- go inspector

### Minimal reproduction project

‮
if (p_call->is_super) {
		push_text("super");
		if (p_call->callee != nullptr) {
			push_text(".");
			print_expression(p_call->callee);
		}
	} else {
		print_expression(p_call->callee);
	}
	push_text("( ");
	for (int i = 0; i < p_call->arguments.size(); i++) {
		if (i > 0) {
			push_text(" , ");
		}
		print_expression(p_call->arguments[i]);
	}
	push_text(" )");
}
void GDScriptParser::TreePrinter::print_cast(CastNode *p_cast) {
	print_expression(p_cast->operand);
	push_text(" AS ");
	print_type(p_cast->cast_type);
}
void GDScriptParser::TreePrinter::print_class(ClassNode *p_class) {