### 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
}
				} else {
					// 
					for (int i = 2; i < p_src_len; i++) {
						eat = i + 1;
						char32_t ct = p_src[i];
						if (ct == ';' || !is_digit(ct)) {
							break;
						}
					}
					if (p_src[eat - 1] == ';') {
						int64_t val = ::to_int(p_src + 2, eat - 3);
						if (val > 0 && val <= UINT32_MAX) {
							c = (char32_t)val;
						} else {
							overflow = true;
						}
					}
				}
				// 
				// 
				if (c == '\0' || overflow || p_src[eat - 1] != ';') {
					eat = 1;
					c = *p_src;
				}
				if (p_dst) {
					*p_dst = c;
				}
			} else if (p_src_len >= 4 && p_src[1] == 'g' && p_src[2] == 't' && p_src[3] == ';') {
				if (p_dst) {