             when 'left'   then newDirection[1] = 'right'
           $trigger.data @attr('direction'), newDirection.join ' '
 
-    # ƒ `_wrapStealthRender` is a helper mostly for size detection on tips and
+    # ___wrapStealthRender__ is a helper mostly for size detection on tips and
     # triggers. Without stealth rendering the elements by temporarily un-hiding
     # and making invisible, we can't do `getComputedStyle` on them.
     _wrapStealthRender: (func) ->

        @$tip.css { display: 'none', visibility: 'visible' }
        return result

    # ### Delegation to Subclass

    # These methods are hooks for custom functionality from subclasses. (Some are
    # set to no-ops becase they are given no arguments.)

        @_saveTriggerContent $trigger
        @_updateDirectionByTrigger $trigger

    # ___updateDirectionByTrigger__ is the main provider of auto-direction
    # support. Given the `$viewport`'s `_bounds`, it changes to the best
    # direction as needed. The current `direction` is stored as jQuery data on
    # the trigger.
    _updateDirectionByTrigger: ($trigger) ->
      return no if @autoDirection is off
      triggerOffset   = @_offsetForTrigger $trigger
