directory separator to support windows path on ask hidden executable file

                                
|Q             |A              |
|-------------|------------|                                
|Bug Fix?:     |y              |
|New Feature?: |n              |
|BC Breaks?:   |n              |
|Deprecations?:|n              |
|Tests Pass?:  |y              |
|Fixed Tickets:|https://github.com/cordoval/gush/issues/196|
|License:      |MIT            |
|Doc PR:       |               |