text: /*-
  Tooltips
  ========
  
  Unpoly used to come with a basic tooltip implementation.
  This feature is now deprecated.
  
  @module up.tooltip
  */
  up.macro('[up-tooltip]', function(opener) {
    up.migrate.warn('[up-tooltip] has been deprecated. A [title] was set instead.')
    up.element.setMissingAttr(opener, 'title', opener.getAttribute('up-tooltip'))
  })
  