### 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

‮
if (previous.type != GDScriptTokenizer::Token::NEWLINE) {
							push_error(R"(Expected newline after a standalone annotation.)");
						}
						head->annotations.push_back(annotation);
					} else {
						annotation_stack.push_back(annotation);
					}
				}
				break;
			}
			case GDScriptTokenizer::Token::PASS:
				advance();
				end_statement(R"("pass")");
				break;
			case GDScriptTokenizer::Token::DEDENT:
				class_end = true;
				break;
			default:
				
				make_completion_context(COMPLETION_IDENTIFIER, nullptr);
				push_error(vformat(R"(Unexpected "%s" in class body.)", current.get_name()));
				advance();
				break;
		}
		if (panic_mode) {
			synchronize();
		}
		if (!p_is_multiline) {
			class_end = true;
		}