### 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

‮
switch (mode) {
			case BRIEF:
				p_brief = (p_brief.length() == 0) ? doc_line : p_brief + line_join + doc_line;
				break;
			case DESC:
				p_desc = (p_desc.length() == 0) ? doc_line : p_desc + line_join + doc_line;
				break;
			case TUTORIALS:
				p_tutorials.append(Pair<String, String>(title, link));
				break;
			case DONE:
				break;
		}
	}
	if (current_class->members.size() > 0) {
		const ClassNode::Member &m = current_class->members[0];
		int first_member_line = m.get_line();
		if (first_member_line == line) {
			p_brief = "";
			p_desc = "";
			p_tutorials.clear();
		}
	}
}
#endif 
GDScriptParser::ParseRule *GDScriptParser::get_rule(GDScriptTokenizer::Token::Type p_token_type) {
	
	
	
	static ParseRule rules[] = {