Fix for terrible Beep Sound in atom when cmd + ctrl + down arrow

If this is driving you nuts, here’s a quick fix

As a temporary workaround, create the following file at ~/Library/KeyBindings/DefaultKeyBinding.dict (or add these entries to the existing file):

{
    "^@\UF701" = "noop:";
    "^@\UF702" = "noop:";
    "^@\UF703" = "noop:";
}