### 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

‮
case Node::IDENTIFIER:
			print_identifier(static_cast<IdentifierNode *>(p_expression));
			break;
		case Node::LAMBDA:
			print_lambda(static_cast<LambdaNode *>(p_expression));
			break;
		case Node::LITERAL:
			print_literal(static_cast<LiteralNode *>(p_expression));
			break;
		case Node::PRELOAD:
			print_preload(static_cast<PreloadNode *>(p_expression));
			break;
		case Node::SELF:
			print_self(static_cast<SelfNode *>(p_expression));
			break;
		case Node::SUBSCRIPT:
			print_subscript(static_cast<SubscriptNode *>(p_expression));
			break;
		case Node::TERNARY_OPERATOR:
			print_ternary_op(static_cast<TernaryOpNode *>(p_expression));
			break;
		case Node::UNARY_OPERATOR:
			print_unary_op(static_cast<UnaryOpNode *>(p_expression));
			break;
		default:
			push_text(vformat("<unknown expression %d>", p_expression->type));
			break;
	}
}
void GDScriptParser::TreePrinter::print_enum(EnumNode *p_enum) {