### 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
escaped = escaped.replace("\\b", "\b");
	escaped = escaped.replace("\\f", "\f");
	escaped = escaped.replace("\\n", "\n");
	escaped = escaped.replace("\\r", "\r");
	escaped = escaped.replace("\\t", "\t");
	escaped = escaped.replace("\\v", "\v");
	escaped = escaped.replace("\\'", "\'");
	escaped = escaped.replace("\\\"", "\"");
	escaped = escaped.replace("\\\\", "\\");
	return escaped;
}
 ::c_escape() const {
	 escaped = *this;
	escaped = escaped.replace("\\", "\\\\");
	escaped = escaped.replace("\a", "\\a");
	escaped = escaped.replace("\b", "\\b");
	escaped = escaped.replace("\f", "\\f");
	escaped = escaped.replace("\n", "\\n");
	escaped = escaped.replace("\r", "\\r");
	escaped = escaped.replace("\t", "\\t");
	escaped = escaped.replace("\v", "\\v");
	escaped = escaped.replace("\'", "\\'");
	escaped = escaped.replace("\"", "\\\"");
	return escaped;
}
 ::c_escape_multiline() const {
	 escaped = *this;
	escaped = escaped.replace("\\", "\\\\");
	escaped = escaped.replace("\"", "\\\"");
	return escaped;