### 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
if (is_empty() && p_str[0] == 0) {
		return false;
	}
	if (is_empty()) {
		return true;
	}
#ifdef WINDOWS_ENABLED
	
	return is_str_less(get_data(), ::utf16((const char16_t *)p_str).get_data());
#else
	
	return is_str_less(get_data(), (const char32_t *)p_str);
#endif
}
bool ::operator<(const char32_t *p_str) const {
	if (is_empty() && p_str[0] == 0) {
		return false;
	}
	if (is_empty()) {
		return true;
	}
	return is_str_less(get_data(), p_str);
}
bool ::operator<(const  &p_str) const {
	return operator<(p_str.get_data());
}
signed char ::nocasecmp_to(const  &p_str) const {