### Godot version

4.2.dev1

### System information

Manjaro Linux (DE: Cinnamon v5.8.4) 64 bits

### Issue description

The title already explains it. Take a look at the steps to reproduce below.

### Steps to reproduce

In a GDScript `_ready()` function write this:
```print_rich("[color=red]Red line\n2nd red line[/color]")```

the second line is not red and the output is as follow:
![Capture d’écran du 2023-07-29 05-50-16](https://github.com/godotengine/godot/assets/102065761/554038c6-d128-40c9-8c88-237b44b35b12)

I tested all the the possible BBCodes for the print_rich() method (as stated in the documentation), and of course they all failed.

The RichTextLabel in my projects works as expected.

### Minimal reproduction project

N/A
log->clear();
	messages.clear();
	_reset_message_counts();
	tool_button->set_icon(Ref<Texture2D>());
}
void EditorLog::_copy_request() {
	String text = log->get_selected_text();
	if (text.is_empty()) {
		text = log->get_parsed_text();
	}
	if (!text.is_empty()) {
		DisplayServer::get_singleton()->clipboard_set(text);
	}
}
void EditorLog::clear() {