### 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

‮
ArrayNode *array = alloc_node<ArrayNode>();
	if (!check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
		do {
			if (check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
				
				break;
			}
			ExpressionNode *element = parse_expression(false);
			if (element == nullptr) {
				push_error(R"(Expected expression as array element.)");
			} else {
				array->elements.push_back(element);
			}
		} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
	}
	pop_multiline();
	consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected closing "]" after array elements.)");
	complete_extents(array);
	return array;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_dictionary(ExpressionNode *p_previous_operand, bool p_can_assign) {