Documentation Error in example: link_to_function

I found the following example doesn't work:

  link_to_function("Show me more", nil, :id => "more_link") do |page|
    page[:details].visual_effect  :toggle_blind
    page[:more_link].replace_html "Show me less"
  end

It returns the error: 'TypeError: Effect[klass] is not a constructor' Changing the syntax to the following works for me:

  link_to_function("Show me more", nil, :id => "more_link") do |page|
    page.visual_effect :toggle_blind, "details"
    page[:more_link].replace_html "Show me less"
  end

Incidentally, if you wish to use 'toggle_slide'. An Additional element (e.g. div) is required inside the element to be toggled. For example:

  link_to_function("Show me more", nil, :id => "more_link") do |page|
    page.visual_effect :toggle_slide, "details"
    page[:more_link].replace_html "Show me less"
  end

<div id="details" style="display:none">
  <div>
    These are the details.
  </div>
</div>

This example still fails in 2.3