### 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

‮
for (int i = 0; i < 2; i++) {
		if (function->name == "set") {
			if (setter_used) {
				push_error(R"(Properties can only have one setter.)");
			} else {
				parse_property_setter(property);
				setter_used = true;
			}
		} else if (function->name == "get") {
			if (getter_used) {
				push_error(R"(Properties can only have one getter.)");
			} else {
				parse_property_getter(property);
				getter_used = true;
			}
		} else {
			
			push_error(R"(Expected "get" or "set" for property declaration.)");
		}
		if (i == 0 && p_variable->property == VariableNode::PROP_SETGET) {
			if (match(GDScriptTokenizer::Token::COMMA)) {
				
				if (match(GDScriptTokenizer::Token::NEWLINE)) {
					if (!p_need_indent) {
						push_error(R"(Inline setter/getter setting cannot span across multiple lines (use "\\"" if needed).)");
					}
				}
			} else {
				break;