'atom-workspace atom-text-editor:not([mini])': 'ctrl-7': 'editor:toggle-line-comments' 'ctrl-right': 'editor:move-to-end-of-screen-line' 'ctrl-left': 'editor:move-to-beginning-of-screen-line'
NB! Do not use duplicate keys!
Look here: http://flight-manual.atom.io/using-atom/sections/basic-customization/#_customizing_keybindings