### 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 ::hex_encode_buffer(p_md5, 16);
}
 ::hex_encode_buffer(const uint8_t *p_buffer, int p_len) {
	static const char hex[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
	 ret;
	char v[2] = { 0, 0 };
	for (int i = 0; i < p_len; i++) {
		v[0] = hex[p_buffer[i] >> 4];
		ret += v;
		v[0] = hex[p_buffer[i] & 0xF];
		ret += v;
	}
	return ret;
}
Vector<uint8_t> ::hex_decode() const {