### Godot version

4.0 beta 16 and 17

### System information

Windows 11

### Issue description

Before beta 16 you could write `@export_category(name)` and it would make a category with "name" as the name.
Now you must use a string when defining the category name. (`@export_category("name")`)
The issue is that the moment you type something that doesn't start with `"` the engine crashes.

### Steps to reproduce

1. Create a script.
2. Write one of the following:
a) `@export_category()`
b) `@export_group()`
c) `@export_subgroup()`
3. In the parentheses write *any* character other than `"`.
4. Watch it crash.

If you managed to save the file the project will crash when opened.

### Minimal reproduction project

[Minimal.zip](https://github.com/godotengine/godot/files/10561826/Minimal.zip)

case ClassNode::Member::CLASS:
				print_class(m.m_class);
				break;
			case ClassNode::Member::VARIABLE:
				print_variable(m.variable);
				break;
			case ClassNode::Member::CONSTANT:
				print_constant(m.constant);
				break;
			case ClassNode::Member::SIGNAL:
				print_signal(m.signal);
				break;
			case ClassNode::Member::FUNCTION:
				print_function(m.function);
				break;
			case ClassNode::Member::ENUM:
				print_enum(m.m_enum);
				break;
			case ClassNode::Member::ENUM_VALUE:
				break; 
			case ClassNode::Member::GROUP:
				break; 
			case ClassNode::Member::UNDEFINED:
				push_line("<unknown member>");
				break;
		}
	}
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_constant(ConstantNode *p_constant) {