.zennable
  %input#zen-toggle-comment{ tabindex: '-1', type: 'checkbox' }
  .zen-backdrop
    - classes << ' js-gfm-input markdown-area'
    = f.text_area attr, class: classes, placeholder: 'Leave a comment'
    %label{ for: 'zen-toggle-comment', class: 'expand' } Edit in fullscreen
    %label{ for: 'zen-toggle-comment', class: 'collapse' }