### 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
while (*this_str) {
			if (!*that_str) {
				return 1;
			} else if (is_digit(*this_str)) {
				if (!is_digit(*that_str)) {
					return -1;
				}
				signed char ret = natural_cmp_common(this_str, that_str);
				if (ret) {
					return ret;
				}
			} else if (is_digit(*that_str)) {
				return 1;
			} else {
				if (*this_str < *that_str) { 
					return -1;
				} else if (*this_str > *that_str) { 
					return 1;
				}
				this_str++;
				that_str++;
			}
		}
		if (*that_str) {
			return -1;
		}
	}
	return 0;
}
signed char ::naturalnocasecmp_to(const  &p_str) const {