### 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

‮
push_text("Match ");
	print_expression(p_match->test);
	push_line(" :");
	increase_indent();
	for (int i = 0; i < p_match->branches.size(); i++) {
		print_match_branch(p_match->branches[i]);
	}
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_match_branch(MatchBranchNode *p_match_branch) {