### 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
/**
 * "Run-time TRanslate for N items". Performs string replacement for
 * internationalization within a running project. The translation string must be
 * supplied by the project, as Godot does not provide built-in translations for
 * `RTRN()` strings to keep binary size low. A translation context can
 * optionally be specified to disambiguate between identical source strings in
 * translations. Use `RTR()` if the string doesn't need dynamic plural form.
 * When placeholders are desired, use
 * `vformat(RTRN("%d item", "%d items", some_integer), some_integer)`.
 * The placeholder must be present in both strings to avoid run-time warnings in `vformat()`.
 *
 * NOTE: Do not use `RTRN()` in editor-only code (typically within the `editor/`
 * folder). For editor translations, use `TTRN()` instead.
 */
 RTRN(const  &p_text, const  &p_text_plural, int p_n, const  &p_context) {
	if (TranslationServer::get_singleton()) {
		 rtr = TranslationServer::get_singleton()->tool_translate_plural(p_text, p_text_plural, p_n, p_context);
		if (rtr.is_empty() || rtr == p_text || rtr == p_text_plural) {
			return TranslationServer::get_singleton()->translate_plural(p_text, p_text_plural, p_n, p_context);
		} else {
			return rtr;
		}
	}
	// 
	if (p_n == 1) {
		return p_text;
	}
	return p_text_plural;
}