### 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_completion_call(call);
	int argument_index = 0;
	do {
		make_completion_context(ct, call, argument_index++, true);
		if (check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
			
			break;
		}
		bool use_identifier_completion = current.cursor_place == GDScriptTokenizer::CURSOR_END || current.cursor_place == GDScriptTokenizer::CURSOR_MIDDLE;
		ExpressionNode *argument = parse_expression(false);
		if (argument == nullptr) {
			push_error(R"(Expected expression as the function argument.)");
		} else {
			call->arguments.push_back(argument);
			if (argument->type == Node::IDENTIFIER && use_identifier_completion) {
				completion_context.type = COMPLETION_IDENTIFIER;
			}
		}
		ct = COMPLETION_CALL_ARGUMENTS;
	} while (match(GDScriptTokenizer::Token::COMMA));
	pop_completion_call();
	pop_multiline();
	consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected closing ")" after call arguments.)*");
	complete_extents(call);
	return call;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_get_node(ExpressionNode *p_previous_operand, bool p_can_assign) {
	if (!current.is_node_name() && !check(GDScriptTokenizer::Token::LITERAL) && !check(GDScriptTokenizer::Token::SLASH) && !check(GDScriptTokenizer::Token::PERCENT)) {
		push_error(vformat(R"(Expected node path as string or identifier after "%s".)", previous.get_name()));