### Godot version

4.1.1

### System information

linux

### Issue description

The `"%+f"` format adds a `+` sign in front of positive numbers. If you try to format `-0.0`, it breaks and displays both a `+` and a `-`.

### Steps to reproduce

```gdscript
@tool
extends EditorScript

func _run() -> void:
    print("%+f" % -0.0)
```

### Minimal reproduction project

see above
return this->_camelcase_to_underscore().replace(" ", "_").strip_edges();
}
 ::get_with_code_lines() const {
	const Vector<> lines = split("\n");
	 ret;
	for (int i = 0; i < lines.size(); i++) {
		if (i > 0) {
			ret += "\n";
		}
		ret += vformat("%4d | %s", i + 1, lines[i]);
	}
	return ret;
}
int ::get_slice_count( p_splitter) const {
	if (is_empty()) {
		return 0;
	}
	if (p_splitter.is_empty()) {
		return 0;
	}
	int pos = 0;
	int slices = 1;
	while ((pos = find(p_splitter, pos)) >= 0) {
		slices++;
		pos += p_splitter.length();
	}
	return slices;
}
 ::get_slice( p_splitter, int p_slice) const {