Atom – ctrl-alt-[ not working

After installing Atom on Windows, I couldn’t use the CTRL-ALT-[ keystroke to open a new square bracket.

Solution from here : https://github.com/atom/atom-keymap/issues/35#issuecomment-221825727 

Add this in keymap.json

'atom-workspace atom-text-editor:not([mini])':
    'ctrl-alt-]': 'unset!'
    'ctrl-alt-[': 'unset!'

Note: this is for french keyboards!