### 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("Constant ");
	print_identifier(p_constant->identifier);
	increase_indent();
	push_line();
	push_text("= ");
	if (p_constant->initializer == nullptr) {
		push_text("<missing value>");
	} else {
		print_expression(p_constant->initializer);
	}
	decrease_indent();
	push_line();
}
void GDScriptParser::TreePrinter::print_dictionary(DictionaryNode *p_dictionary) {
	push_line("{");
	increase_indent();
	for (int i = 0; i < p_dictionary->elements.size(); i++) {
		print_expression(p_dictionary->elements[i].key);
		if (p_dictionary->style == DictionaryNode::PYTHON_DICT) {
			push_text(" : ");
		} else {
			push_text(" = ");
		}
		print_expression(p_dictionary->elements[i].value);
		push_line(" ,");
	}
	decrease_indent();
	push_text("}");
}