### 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.is_empty()) {
		return 0;
	}
	if (is_empty()) {
		return -1;
	}
	if (p_str.is_empty()) {
		return 1;
	}
	const char32_t *that_str = p_str.get_data();
	const char32_t *this_str = get_data();
	while (true) {
		if (*that_str == 0 && *this_str == 0) { 
			return 0;
		} else if (*this_str == 0) { 
			return -1;
		} else if (*that_str == 0) { 
			return 1;
		} else if (*this_str < *that_str) { 
			return -1;
		} else if (*this_str > *that_str) { 
			return 1;
		}
		this_str++;
		that_str++;
	}
}
static _FORCE_INLINE_ signed char natural_cmp_common(const char32_t *&r_this_str, const char32_t *&r_that_str) {