### Godot version

4.0.2

### System information

Windows 10

### Issue description

EDIT: this was fixed by removing the offending files listed with the MRP and then dragging them back in from my desktop after opening the project~

I was developing my game then suddenly this started happening. I can no longer playtest my game.
I am not 100% sure what caused this but I believe at the time I was making a new inherited scene, saved it, then moved some scenes in the FileSystem tab?

![image](https://user-images.githubusercontent.com/75141902/235264827-62419c7d-963b-4002-9452-a6493a9bfe25.png)


### Steps to reproduce

No idea aaa- x-x

### Minimal reproduction project

Since I have no idea what caused it here's my early project :'D
https://drive.google.com/file/d/14JFZ420AelUNjBIth78msHY29rNjB55_/view?usp=share_link

I was working on these when the error occurred:
- Slot_0.tcsn
- Slot_Clickable.tscn
- Slot_Orphan.tscn
- Slot_Orphan.gd

DOC_LINE_NORMAL,
	DOC_LINE_IN_CODE,
	DOC_LINE_IN_CODEBLOCK,
};
static String _process_doc_line(const String &p_line, const String &p_text, const String &p_space_prefix, DocLineState &r_state) {
	String line = p_line;
	if (r_state == DOC_LINE_NORMAL) {
		line = line.strip_edges(true, false);
	} else {
		line = line.trim_prefix(p_space_prefix);
	}
	String line_join;
	if (!p_text.is_empty()) {
		if (r_state == DOC_LINE_NORMAL) {
			if (p_text.ends_with("[/codeblock]")) {
				line_join = "\n";
			} else if (!p_text.ends_with("[br]")) {
				line_join = " ";
			}
		} else {
			line_join = "\n";
		}
	}