### 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

‮
TernaryOpNode *operation = alloc_node<TernaryOpNode>();
	reset_extents(operation, p_previous_operand);
	update_extents(operation);
	operation->true_expr = p_previous_operand;
	operation->condition = parse_precedence(PREC_TERNARY, false);
	if (operation->condition == nullptr) {
		push_error(R"(Expected expression as ternary condition after "if".)");
	}
	consume(GDScriptTokenizer::Token::ELSE, R"(Expected "else" after ternary operator condition.)");
	operation->false_expr = parse_precedence(PREC_TERNARY, false);
	if (operation->false_expr == nullptr) {
		push_error(R"(Expected expression after "else".)");
	}
	complete_extents(operation);
	return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_assignment(ExpressionNode *p_previous_operand, bool p_can_assign) {